51381488 has 20 divisors (see below), whose sum is σ = 100917648. Its totient is φ = 25338240.

The previous prime is 51381479. The next prime is 51381503. The reversal of 51381488 is 88418315.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20828 + ... + 23163.

Almost surely, 2^51381488 is an apocalyptic number.

It is an amenable number.

51381488 is a deficient number, since it is larger than the sum of its proper divisors (49536160).

51381488 is a wasteful number, since it uses less digits than its factorization.

51381488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44072 (or 44066 counting only the distinct ones).

The product of its digits is 30720, while the sum is 38.

The square root of 51381488 is about 7168.0881691006. The cubic root of 51381488 is about 371.7653354860.

The spelling of 51381488 in words is "fifty-one million, three hundred eighty-one thousand, four hundred eighty-eight".