51415938 has 64 divisors (see below), whose sum is σ = 137472000. Its totient is φ = 13915152.

The previous prime is 51415937. The next prime is 51415951. The reversal of 51415938 is 83951415.

It is not an unprimeable number, because it can be changed into a prime (51415937) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3603 + ... + 10761.

It is an arithmetic number, because the mean of its divisors is an integer number (2148000).

Almost surely, 2^51415938 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51415938, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68736000).

51415938 is an abundant number, since it is smaller than the sum of its proper divisors (86056062).

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

51415938 is a wasteful number, since it uses less digits than its factorization.

51415938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7196 (or 7190 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 51415938 is about 7170.4907781825. The cubic root of 51415938 is about 371.8484033705.

The spelling of 51415938 in words is "fifty-one million, four hundred fifteen thousand, nine hundred thirty-eight".