51572742 has 16 divisors (see below), whose sum is σ = 111079920. Its totient is φ = 15868512.

The previous prime is 51572737. The next prime is 51572743. The reversal of 51572742 is 24727515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51572743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 330517 + ... + 330672.

It is an arithmetic number, because the mean of its divisors is an integer number (6942495).

Almost surely, 2^51572742 is an apocalyptic number.

51572742 is an abundant number, since it is smaller than the sum of its proper divisors (59507178).

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

51572742 is a wasteful number, since it uses less digits than its factorization.

51572742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661207.

The product of its digits is 19600, while the sum is 33.

The square root of 51572742 is about 7181.4164341027. The cubic root of 51572742 is about 372.2260303992.

The spelling of 51572742 in words is "fifty-one million, five hundred seventy-two thousand, seven hundred forty-two".