51138588 has 48 divisors (see below), whose sum is σ = 123530400. Its totient is φ = 16452864.

The previous prime is 51138569. The next prime is 51138589. The reversal of 51138588 is 88583115.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51138589) 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, 65770 + ... + 66542.

It is an arithmetic number, because the mean of its divisors is an integer number (2573550).

Almost surely, 2^51138588 is an apocalyptic number.

It is an amenable number.

51138588 is an abundant number, since it is smaller than the sum of its proper divisors (72391812).

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

51138588 is a wasteful number, since it uses less digits than its factorization.

51138588 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966 (or 964 counting only the distinct ones).

The product of its digits is 38400, while the sum is 39.

The square root of 51138588 is about 7151.1249464682. The cubic root of 51138588 is about 371.1785841384.

The spelling of 51138588 in words is "fifty-one million, one hundred thirty-eight thousand, five hundred eighty-eight".