81532708 has 12 divisors (see below), whose sum is σ = 144692352. Its totient is φ = 40192040.

The previous prime is 81532681. The next prime is 81532727. The reversal of 81532708 is 80723518.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143260 + ... + 143827.

It is an arithmetic number, because the mean of its divisors is an integer number (12057696).

Almost surely, 2^81532708 is an apocalyptic number.

It is an amenable number.

81532708 is a deficient number, since it is larger than the sum of its proper divisors (63159644).

81532708 is a wasteful number, since it uses less digits than its factorization.

81532708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287162 (or 287160 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 81532708 is about 9029.5463894927. The cubic root of 81532708 is about 433.6213152128.

The spelling of 81532708 in words is "eighty-one million, five hundred thirty-two thousand, seven hundred eight".