81934252 has 6 divisors (see below), whose sum is σ = 143384948. Its totient is φ = 40967124.

The previous prime is 81934249. The next prime is 81934273. The reversal of 81934252 is 25243918.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10241778 + ... + 10241785.

Almost surely, 2^81934252 is an apocalyptic number.

It is an amenable number.

81934252 is a deficient number, since it is larger than the sum of its proper divisors (61450696).

81934252 is a wasteful number, since it uses less digits than its factorization.

81934252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20483567 (or 20483565 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 81934252 is about 9051.7540841541. The cubic root of 81934252 is about 434.3320033145.

The spelling of 81934252 in words is "eighty-one million, nine hundred thirty-four thousand, two hundred fifty-two".