81080252 has 24 divisors (see below), whose sum is σ = 159785472. Its totient is φ = 35665200.

The previous prime is 81080231. The next prime is 81080273. The reversal of 81080252 is 25208018.

It is an interprime number because it is at equal distance from previous prime (81080231) and next prime (81080273).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28358 + ... + 31085.

It is an arithmetic number, because the mean of its divisors is an integer number (6657728).

Almost surely, 2^81080252 is an apocalyptic number.

It is an amenable number.

81080252 is a deficient number, since it is larger than the sum of its proper divisors (78705220).

81080252 is a wasteful number, since it uses less digits than its factorization.

81080252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59489 (or 59487 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 81080252 is about 9004.4573406730. The cubic root of 81080252 is about 432.8177170289.

The spelling of 81080252 in words is "eighty-one million, eighty thousand, two hundred fifty-two".