77112531 has 12 divisors (see below), whose sum is σ = 114978240. Its totient is φ = 49749840.

The previous prime is 77112523. The next prime is 77112547. The reversal of 77112531 is 13521177.

It is a happy number.

It is not a de Polignac number, because 77112531 - 2³ = 77112523 is a prime.

It is a super-2 number, since 2×77112531² = 11892684874451922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 77112495 and 77112504.

It is not an unprimeable number, because it can be changed into a prime (77112521) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137916 + ... + 138473.

It is an arithmetic number, because the mean of its divisors is an integer number (9581520).

Almost surely, 2^77112531 is an apocalyptic number.

77112531 is a deficient number, since it is larger than the sum of its proper divisors (37865709).

77112531 is a wasteful number, since it uses less digits than its factorization.

77112531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276426 (or 276423 counting only the distinct ones).

The product of its digits is 1470, while the sum is 27.

The square root of 77112531 is about 8781.3740952086. The cubic root of 77112531 is about 425.6392336769.

The spelling of 77112531 in words is "seventy-seven million, one hundred twelve thousand, five hundred thirty-one".