2231420220 has 36 divisors (see below), whose sum is σ = 6768641880. Its totient is φ = 595045344.

The previous prime is 2231420209. The next prime is 2231420231. The reversal of 2231420220 is 220241322.

2231420220 is a `hidden beast` number, since 2 + 23 + 1 + 420 + 220 = 666.

It is an interprime number because it is at equal distance from previous prime (2231420209) and next prime (2231420231).

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×2231420220³ (a number of 29 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 2231420193 and 2231420202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6198210 + ... + 6198569.

It is an arithmetic number, because the mean of its divisors is an integer number (188017830).

Almost surely, 2^2231420220 is an apocalyptic number.

2231420220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2231420220 is an abundant number, since it is smaller than the sum of its proper divisors (4537221660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2231420220 is a wasteful number, since it uses less digits than its factorization.

2231420220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12396794 (or 12396789 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 2231420220 is about 47237.9108344135. The cubic root of 2231420220 is about 1306.7538492028.

Adding to 2231420220 its reverse (220241322), we get a palindrome (2451661542).

The spelling of 2231420220 in words is "two billion, two hundred thirty-one million, four hundred twenty thousand, two hundred twenty".