76431005531 has 4 divisors (see below), whose sum is σ = 79754092752. Its totient is φ = 73107918312.

The previous prime is 76431005513. The next prime is 76431005537. The reversal of 76431005531 is 13550013467.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-76431005531 is a prime.

It is a super-2 number, since 2×76431005531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 76431005491 and 76431005500.

It is not an unprimeable number, because it can be changed into a prime (76431005537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1661543576 + ... + 1661543621.

It is an arithmetic number, because the mean of its divisors is an integer number (19938523188).

Almost surely, 2^76431005531 is an apocalyptic number.

76431005531 is a deficient number, since it is larger than the sum of its proper divisors (3323087221).

76431005531 is a wasteful number, since it uses less digits than its factorization.

76431005531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3323087220.

The product of its (nonzero) digits is 37800, while the sum is 35.

Adding to 76431005531 its reverse (13550013467), we get a palindrome (89981018998).

The spelling of 76431005531 in words is "seventy-six billion, four hundred thirty-one million, five thousand, five hundred thirty-one".