57071945 has 16 divisors (see below), whose sum is σ = 80387328. Its totient is φ = 38076480.

The previous prime is 57071923. The next prime is 57071951. The reversal of 57071945 is 54917075.

It is not a de Polignac number, because 57071945 - 2¹⁶ = 57006409 is a prime.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 57071899 and 57071908.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20741 + ... + 23330.

It is an arithmetic number, because the mean of its divisors is an integer number (5024208).

Almost surely, 2^57071945 is an apocalyptic number.

It is an amenable number.

57071945 is a deficient number, since it is larger than the sum of its proper divisors (23315383).

57071945 is a wasteful number, since it uses less digits than its factorization.

57071945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44120.

The product of its (nonzero) digits is 44100, while the sum is 38.

The square root of 57071945 is about 7554.5976067558. The cubic root of 57071945 is about 385.0119634220.

The spelling of 57071945 in words is "fifty-seven million, seventy-one thousand, nine hundred forty-five".