51890252 has 6 divisors (see below), whose sum is σ = 90807948. Its totient is φ = 25945124.

The previous prime is 51890221. The next prime is 51890261. The reversal of 51890252 is 25209815.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6486278 + ... + 6486285.

It is an arithmetic number, because the mean of its divisors is an integer number (15134658).

Almost surely, 2^51890252 is an apocalyptic number.

It is an amenable number.

51890252 is a deficient number, since it is larger than the sum of its proper divisors (38917696).

51890252 is a wasteful number, since it uses less digits than its factorization.

51890252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12972567 (or 12972565 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 51890252 is about 7203.4888769262. The cubic root of 51890252 is about 372.9883437864.

The spelling of 51890252 in words is "fifty-one million, eight hundred ninety thousand, two hundred fifty-two".