51501372 has 48 divisors (see below), whose sum is σ = 131876640. Its totient is φ = 15545088.

The previous prime is 51501349. The next prime is 51501377. The reversal of 51501372 is 27310515.

51501372 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51501377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5154 + ... + 11382.

It is an arithmetic number, because the mean of its divisors is an integer number (2747430).

Almost surely, 2^51501372 is an apocalyptic number.

51501372 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51501372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65938320).

51501372 is an abundant number, since it is smaller than the sum of its proper divisors (80375268).

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

51501372 is a wasteful number, since it uses less digits than its factorization.

51501372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6302 (or 6300 counting only the distinct ones).

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 51501372 is about 7176.4456383366. The cubic root of 51501372 is about 372.0542469162.

Adding to 51501372 its reverse (27310515), we get a palindrome (78811887).

The spelling of 51501372 in words is "fifty-one million, five hundred one thousand, three hundred seventy-two".