81230252 has 12 divisors (see below), whose sum is σ = 142476936. Its totient is φ = 40522560.

The previous prime is 81230221. The next prime is 81230269. The reversal of 81230252 is 25203218.

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, 21149 + ... + 24692.

It is an arithmetic number, because the mean of its divisors is an integer number (11873078).

Almost surely, 2^81230252 is an apocalyptic number.

It is an amenable number.

81230252 is a deficient number, since it is larger than the sum of its proper divisors (61246684).

81230252 is a wasteful number, since it uses less digits than its factorization.

81230252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46288 (or 46286 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 81230252 is about 9012.7827001432. The cubic root of 81230252 is about 433.0844595916.

The spelling of 81230252 in words is "eighty-one million, two hundred thirty thousand, two hundred fifty-two".