2521211231 has 32 divisors (see below), whose sum is σ = 3336007680. Its totient is φ = 1844697600.

The previous prime is 2521211201. The next prime is 2521211257. The reversal of 2521211231 is 1321121252.

2521211231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 2521211231 - 2⁶ = 2521211167 is a prime.

It is a super-2 number, since 2×2521211231² = 12713012142641070722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521211201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 625001 + ... + 629021.

It is an arithmetic number, because the mean of its divisors is an integer number (104250240).

Almost surely, 2^2521211231 is an apocalyptic number.

2521211231 is a deficient number, since it is larger than the sum of its proper divisors (814796449).

2521211231 is a wasteful number, since it uses less digits than its factorization.

2521211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4535.

The product of its digits is 240, while the sum is 20.

The square root of 2521211231 is about 50211.6642922738. The cubic root of 2521211231 is about 1361.0364128007.

Adding to 2521211231 its reverse (1321121252), we get a palindrome (3842332483).

It can be divided in two parts, 252121 and 1231, that added together give a palindrome (253352).

The spelling of 2521211231 in words is "two billion, five hundred twenty-one million, two hundred eleven thousand, two hundred thirty-one".