81152924 has 24 divisors (see below), whose sum is σ = 148569120. Its totient is φ = 38713664.

The previous prime is 81152893. The next prime is 81152927. The reversal of 81152924 is 42925118.

It is a super-4 number, since 4×81152924⁴ (a number of 33 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81152927) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45962 + ... + 47694.

It is an arithmetic number, because the mean of its divisors is an integer number (6190380).

Almost surely, 2^81152924 is an apocalyptic number.

It is an amenable number.

81152924 is a deficient number, since it is larger than the sum of its proper divisors (67416196).

81152924 is a wasteful number, since it uses less digits than its factorization.

81152924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2269 (or 2267 counting only the distinct ones).

The product of its digits is 5760, while the sum is 32.

The square root of 81152924 is about 9008.4917716563. The cubic root of 81152924 is about 432.9469895119.

It can be divided in two parts, 811 and 52924, that added together give a palindrome (53735).

The spelling of 81152924 in words is "eighty-one million, one hundred fifty-two thousand, nine hundred twenty-four".