82311075531 has 32 divisors (see below), whose sum is σ = 125681041920. Its totient is φ = 53202124512.

The previous prime is 82311075527. The next prime is 82311075557. The reversal of 82311075531 is 13557011328.

It is a happy number.

82311075531 is a `hidden beast` number, since 8 + 2 + 3 + 110 + 7 + 5 + 531 = 666.

It is not a de Polignac number, because 82311075531 - 2² = 82311075527 is a prime.

It is a super-2 number, since 2×82311075531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82311075331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137146 + ... + 428288.

It is an arithmetic number, because the mean of its divisors is an integer number (3927532560).

Almost surely, 2^82311075531 is an apocalyptic number.

82311075531 is a deficient number, since it is larger than the sum of its proper divisors (43369966389).

82311075531 is a wasteful number, since it uses less digits than its factorization.

82311075531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 291472 (or 291466 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

Adding to 82311075531 its reverse (13557011328), we get a palindrome (95868086859).

The spelling of 82311075531 in words is "eighty-two billion, three hundred eleven million, seventy-five thousand, five hundred thirty-one".