81054274 has 16 divisors (see below), whose sum is σ = 143433216. Its totient is φ = 33616800.

The previous prime is 81054257. The next prime is 81054307. The reversal of 81054274 is 47245018.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92947 + ... + 93814.

It is an arithmetic number, because the mean of its divisors is an integer number (8964576).

Almost surely, 2^81054274 is an apocalyptic number.

81054274 is a deficient number, since it is larger than the sum of its proper divisors (62378942).

81054274 is a wasteful number, since it uses less digits than its factorization.

81054274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186801.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 81054274 is about 9003.0147173044. The cubic root of 81054274 is about 432.7714873596.

The spelling of 81054274 in words is "eighty-one million, fifty-four thousand, two hundred seventy-four".