57278725 has 12 divisors (see below), whose sum is σ = 81172384. Its totient is φ = 39276720.

The previous prime is 57278719. The next prime is 57278761. The reversal of 57278725 is 52787275.

It is not a de Polignac number, because 57278725 - 2¹¹ = 57276677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163479 + ... + 163828.

Almost surely, 2^57278725 is an apocalyptic number.

It is an amenable number.

57278725 is a deficient number, since it is larger than the sum of its proper divisors (23893659).

57278725 is a wasteful number, since it uses less digits than its factorization.

57278725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327324 (or 327319 counting only the distinct ones).

The product of its digits is 274400, while the sum is 43.

The square root of 57278725 is about 7568.2709385962. The cubic root of 57278725 is about 385.4763878562.

It can be divided in two parts, 572 and 78725, that added together give a palindrome (79297).

The spelling of 57278725 in words is "fifty-seven million, two hundred seventy-eight thousand, seven hundred twenty-five".