51233730 has 16 divisors (see below), whose sum is σ = 122961024. Its totient is φ = 13662320.

The previous prime is 51233711. The next prime is 51233737. The reversal of 51233730 is 3733215.

It is a self number, because there is not a number n which added to its sum of digits gives 51233730.

It is not an unprimeable number, because it can be changed into a prime (51233737) 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, 853866 + ... + 853925.

It is an arithmetic number, because the mean of its divisors is an integer number (7685064).

Almost surely, 2^51233730 is an apocalyptic number.

51233730 is an abundant number, since it is smaller than the sum of its proper divisors (71727294).

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

51233730 is a wasteful number, since it uses less digits than its factorization.

51233730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707801.

The product of its (nonzero) digits is 1890, while the sum is 24.

The square root of 51233730 is about 7157.7740953456. The cubic root of 51233730 is about 371.4086308681.

Adding to 51233730 its reverse (3733215), we get a palindrome (54966945).

The spelling of 51233730 in words is "fifty-one million, two hundred thirty-three thousand, seven hundred thirty".