2531023220 has 24 divisors (see below), whose sum is σ = 5798344608. Its totient is φ = 920372000.

The previous prime is 2531023213. The next prime is 2531023267. The reversal of 2531023220 is 223201352.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 2531023192 and 2531023201.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5752106 + ... + 5752545.

It is an arithmetic number, because the mean of its divisors is an integer number (241597692).

Almost surely, 2^2531023220 is an apocalyptic number.

2531023220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2531023220 is an abundant number, since it is smaller than the sum of its proper divisors (3267321388).

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

2531023220 is a wasteful number, since it uses less digits than its factorization.

2531023220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11504671 (or 11504669 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 2531023220 is about 50309.2756855036. The cubic root of 2531023220 is about 1362.7997434967.

Adding to 2531023220 its reverse (223201352), we get a palindrome (2754224572).

The spelling of 2531023220 in words is "two billion, five hundred thirty-one million, twenty-three thousand, two hundred twenty".