51357138 has 16 divisors (see below), whose sum is σ = 117387840. Its totient is φ = 14673456.

The previous prime is 51357113. The next prime is 51357157. The reversal of 51357138 is 83175315.

It is a junction number, because it is equal to n+sod(n) for n = 51357099 and 51357108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 611353 + ... + 611436.

It is an arithmetic number, because the mean of its divisors is an integer number (7336740).

Almost surely, 2^51357138 is an apocalyptic number.

51357138 is an abundant number, since it is smaller than the sum of its proper divisors (66030702).

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

51357138 is a wasteful number, since it uses less digits than its factorization.

51357138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1222801.

The product of its digits is 12600, while the sum is 33.

The square root of 51357138 is about 7166.3894675073. The cubic root of 51357138 is about 371.7065989211.

The spelling of 51357138 in words is "fifty-one million, three hundred fifty-seven thousand, one hundred thirty-eight".