51899388 has 24 divisors (see below), whose sum is σ = 121252992. Its totient is φ = 17277744.

The previous prime is 51899381. The next prime is 51899389. The reversal of 51899388 is 88399815.

It is a self number, because there is not a number n which added to its sum of digits gives 51899388.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51899381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9081 + ... + 13647.

It is an arithmetic number, because the mean of its divisors is an integer number (5052208).

Almost surely, 2^51899388 is an apocalyptic number.

It is an amenable number.

51899388 is an abundant number, since it is smaller than the sum of its proper divisors (69353604).

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

51899388 is a wasteful number, since it uses less digits than its factorization.

51899388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5521 (or 5519 counting only the distinct ones).

The product of its digits is 622080, while the sum is 51.

The square root of 51899388 is about 7204.1229861795. The cubic root of 51899388 is about 373.0102324290.

The spelling of 51899388 in words is "fifty-one million, eight hundred ninety-nine thousand, three hundred eighty-eight".