51899238 has 16 divisors (see below), whose sum is σ = 115331760. Its totient is φ = 17299728.

The previous prime is 51899219. The next prime is 51899251. The reversal of 51899238 is 83299815.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 51899193 and 51899202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 480495 + ... + 480602.

It is an arithmetic number, because the mean of its divisors is an integer number (7208235).

Almost surely, 2^51899238 is an apocalyptic number.

51899238 is an abundant number, since it is smaller than the sum of its proper divisors (63432522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51899238 is a wasteful number, since it uses less digits than its factorization.

51899238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961108 (or 961102 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 51899238 is about 7204.1125754669. The cubic root of 51899238 is about 373.0098730696.

The spelling of 51899238 in words is "fifty-one million, eight hundred ninety-nine thousand, two hundred thirty-eight".