2521136431 has 16 divisors (see below), whose sum is σ = 3012539040. Its totient is φ = 2082734080.

The previous prime is 2521136413. The next prime is 2521136441. The reversal of 2521136431 is 1346311252.

It is a cyclic number.

It is not a de Polignac number, because 2521136431 - 2²³ = 2512747823 is a prime.

It is a super-2 number, since 2×2521136431² = 12712257807430835522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2521136431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521136441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227026 + ... + 237871.

It is an arithmetic number, because the mean of its divisors is an integer number (188283690).

Almost surely, 2^2521136431 is an apocalyptic number.

2521136431 is a deficient number, since it is larger than the sum of its proper divisors (491402609).

2521136431 is a wasteful number, since it uses less digits than its factorization.

2521136431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464954.

The product of its digits is 4320, while the sum is 28.

The square root of 2521136431 is about 50210.9194398987. The cubic root of 2521136431 is about 1361.0229527979.

Adding to 2521136431 its reverse (1346311252), we get a palindrome (3867447683).

The spelling of 2521136431 in words is "two billion, five hundred twenty-one million, one hundred thirty-six thousand, four hundred thirty-one".