51488538 has 32 divisors (see below), whose sum is σ = 105985152. Its totient is φ = 16665600.

The previous prime is 51488509. The next prime is 51488539. The reversal of 51488538 is 83588415.

It is a self number, because there is not a number n which added to its sum of digits gives 51488538.

It is not an unprimeable number, because it can be changed into a prime (51488539) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76170 + ... + 76842.

It is an arithmetic number, because the mean of its divisors is an integer number (3312036).

Almost surely, 2^51488538 is an apocalyptic number.

51488538 is an abundant number, since it is smaller than the sum of its proper divisors (54496614).

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

51488538 is a wasteful number, since it uses less digits than its factorization.

51488538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030.

The product of its digits is 153600, while the sum is 42.

The square root of 51488538 is about 7175.5514073833. The cubic root of 51488538 is about 372.0233393843.

The spelling of 51488538 in words is "fifty-one million, four hundred eighty-eight thousand, five hundred thirty-eight".