51085975 has 24 divisors (see below), whose sum is σ = 65117360. Its totient is φ = 39744000.

The previous prime is 51085963. The next prime is 51085987. The reversal of 51085975 is 57958015.

It is an interprime number because it is at equal distance from previous prime (51085963) and next prime (51085987).

It is not a de Polignac number, because 51085975 - 2⁵ = 51085943 is a prime.

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, 211855 + ... + 212095.

Almost surely, 2^51085975 is an apocalyptic number.

51085975 is a deficient number, since it is larger than the sum of its proper divisors (14031385).

51085975 is a wasteful number, since it uses less digits than its factorization.

51085975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 451 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 40.

The square root of 51085975 is about 7147.4453478148. The cubic root of 51085975 is about 371.0512470287.

The spelling of 51085975 in words is "fifty-one million, eighty-five thousand, nine hundred seventy-five".