2521331231 has 8 divisors (see below), whose sum is σ = 2637905280. Its totient is φ = 2405336472.

The previous prime is 2521331221. The next prime is 2521331249. The reversal of 2521331231 is 1321331252.

2521331231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2521331231 - 2⁶ = 2521331167 is a prime.

It is a super-2 number, since 2×2521331231² = 12714222352831950722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2521331197 and 2521331206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521331221) 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, 135905 + ... + 153338.

It is an arithmetic number, because the mean of its divisors is an integer number (329738160).

Almost surely, 2^2521331231 is an apocalyptic number.

2521331231 is a deficient number, since it is larger than the sum of its proper divisors (116574049).

2521331231 is a wasteful number, since it uses less digits than its factorization.

2521331231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289645.

The product of its digits is 1080, while the sum is 23.

The square root of 2521331231 is about 50212.8592195266. The cubic root of 2521331231 is about 1361.0580058319.

Adding to 2521331231 its reverse (1321331252), we get a palindrome (3842662483).

The spelling of 2521331231 in words is "two billion, five hundred twenty-one million, three hundred thirty-one thousand, two hundred thirty-one".