2521023531 has 24 divisors (see below), whose sum is σ = 3831405120. Its totient is φ = 1469740896.

The previous prime is 2521023511. The next prime is 2521023541. The reversal of 2521023531 is 1353201252.

It is a happy number.

It is not a de Polignac number, because 2521023531 - 2⁵ = 2521023499 is a prime.

It is a super-2 number, since 2×2521023531² = 12711119287711415922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2521023511) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 121221 + ... + 140486.

It is an arithmetic number, because the mean of its divisors is an integer number (159641880).

Almost surely, 2^2521023531 is an apocalyptic number.

2521023531 is a deficient number, since it is larger than the sum of its proper divisors (1310381589).

2521023531 is a wasteful number, since it uses less digits than its factorization.

2521023531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261755 (or 261742 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 2521023531 is about 50209.7951698670. The cubic root of 2521023531 is about 1361.0026363270.

Adding to 2521023531 its reverse (1353201252), we get a palindrome (3874224783).

The spelling of 2521023531 in words is "two billion, five hundred twenty-one million, twenty-three thousand, five hundred thirty-one".