51875990 has 32 divisors (see below), whose sum is σ = 95424480. Its totient is φ = 20300544.

The previous prime is 51875987. The next prime is 51876001. The reversal of 51875990 is 9957815.

It is a happy number.

It is a super-2 number, since 2×51875990² = 5382236676960200, which contains 22 as substring.

It is a congruent number.

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, 130472 + ... + 130868.

It is an arithmetic number, because the mean of its divisors is an integer number (2982015).

Almost surely, 2^51875990 is an apocalyptic number.

51875990 is a deficient number, since it is larger than the sum of its proper divisors (43548490).

51875990 is a wasteful number, since it uses less digits than its factorization.

51875990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656.

The product of its (nonzero) digits is 113400, while the sum is 44.

The square root of 51875990 is about 7202.4988719194. The cubic root of 51875990 is about 372.9541687921.

The spelling of 51875990 in words is "fifty-one million, eight hundred seventy-five thousand, nine hundred ninety".