51372120 has 64 divisors (see below), whose sum is σ = 156096000. Its totient is φ = 13523328.

The previous prime is 51372119. The next prime is 51372131. The reversal of 51372120 is 2127315.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6771 + ... + 12189.

It is an arithmetic number, because the mean of its divisors is an integer number (2439000).

Almost surely, 2^51372120 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51372120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78048000).

51372120 is an abundant number, since it is smaller than the sum of its proper divisors (104723880).

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

51372120 is a wasteful number, since it uses less digits than its factorization.

51372120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5512 (or 5508 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 51372120 is about 7167.4346875294. The cubic root of 51372120 is about 371.7427403875.

Adding to 51372120 its reverse (2127315), we get a palindrome (53499435).

The spelling of 51372120 in words is "fifty-one million, three hundred seventy-two thousand, one hundred twenty".