51361975 has 24 divisors (see below), whose sum is σ = 73392128. Its totient is φ = 34927200.

The previous prime is 51361907. The next prime is 51361993. The reversal of 51361975 is 57916315.

It is not a de Polignac number, because 51361975 - 2⁷ = 51361847 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 23 ways as a sum of consecutive naturals, for example, 21070 + ... + 23380.

Almost surely, 2^51361975 is an apocalyptic number.

51361975 is a deficient number, since it is larger than the sum of its proper divisors (22030153).

51361975 is a wasteful number, since it uses less digits than its factorization.

51361975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2455 (or 2450 counting only the distinct ones).

The product of its digits is 28350, while the sum is 37.

The square root of 51361975 is about 7166.7269377311. The cubic root of 51361975 is about 371.7182681096.

The spelling of 51361975 in words is "fifty-one million, three hundred sixty-one thousand, nine hundred seventy-five".