5431232521 has 16 divisors (see below), whose sum is σ = 6427346688. Its totient is φ = 4524393600.

The previous prime is 5431232507. The next prime is 5431232531. The reversal of 5431232521 is 1252321345.

It is a cyclic number.

It is not a de Polignac number, because 5431232521 - 2²⁵ = 5397678089 is a prime.

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 5431232521.

It is not an unprimeable number, because it can be changed into a prime (5431232531) 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, 119025 + ... + 158206.

It is an arithmetic number, because the mean of its divisors is an integer number (401709168).

Almost surely, 2^5431232521 is an apocalyptic number.

It is an amenable number.

5431232521 is a deficient number, since it is larger than the sum of its proper divisors (996114167).

5431232521 is a wasteful number, since it uses less digits than its factorization.

5431232521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277392.

The product of its digits is 7200, while the sum is 28.

The square root of 5431232521 is about 73696.8962779302. The cubic root of 5431232521 is about 1757.7865296513.

Adding to 5431232521 its reverse (1252321345), we get a palindrome (6683553866).

The spelling of 5431232521 in words is "five billion, four hundred thirty-one million, two hundred thirty-two thousand, five hundred twenty-one".