2620251220 has 24 divisors (see below), whose sum is σ = 5508768384. Its totient is φ = 1046911776.

The previous prime is 2620251217. The next prime is 2620251229. The reversal of 2620251220 is 221520262.

It is a happy number.

2620251220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2620251220² = 13731432911822976800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2620251191 and 2620251200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2620251229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56112 + ... + 91591.

It is an arithmetic number, because the mean of its divisors is an integer number (229532016).

Almost surely, 2^2620251220 is an apocalyptic number.

2620251220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2620251220 is an abundant number, since it is smaller than the sum of its proper divisors (2888517164).

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

2620251220 is a wasteful number, since it uses less digits than its factorization.

2620251220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148599 (or 148597 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2620251220 is about 51188.3895038709. The cubic root of 2620251220 is about 1378.6297432777.

Adding to 2620251220 its reverse (221520262), we get a palindrome (2841771482).

The spelling of 2620251220 in words is "two billion, six hundred twenty million, two hundred fifty-one thousand, two hundred twenty".