51544388 has 12 divisors (see below), whose sum is σ = 103088832. Its totient is φ = 22090440.

The previous prime is 51544387. The next prime is 51544399. The reversal of 51544388 is 88344515.

51544388 is an admirable number.

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 not an unprimeable number, because it can be changed into a prime (51544387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920408 + ... + 920463.

It is an arithmetic number, because the mean of its divisors is an integer number (8590736).

Almost surely, 2^51544388 is an apocalyptic number.

It is an amenable number.

51544388 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51544388 is a wasteful number, since it uses less digits than its factorization.

51544388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840882 (or 1840880 counting only the distinct ones).

The product of its digits is 76800, while the sum is 38.

The square root of 51544388 is about 7179.4420396017. The cubic root of 51544388 is about 372.1578029389.

The spelling of 51544388 in words is "fifty-one million, five hundred forty-four thousand, three hundred eighty-eight".