51220330 has 16 divisors (see below), whose sum is σ = 105367680. Its totient is φ = 17561232.

The previous prime is 51220307. The next prime is 51220343. The reversal of 51220330 is 3302215.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365790 + ... + 365929.

It is an arithmetic number, because the mean of its divisors is an integer number (6585480).

Almost surely, 2^51220330 is an apocalyptic number.

51220330 is an abundant number, since it is smaller than the sum of its proper divisors (54147350).

51220330 is a wasteful number, since it uses less digits than its factorization.

51220330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731733.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 51220330 is about 7156.8379889446. The cubic root of 51220330 is about 371.3762478422.

Adding to 51220330 its reverse (3302215), we get a palindrome (54522545).

The spelling of 51220330 in words is "fifty-one million, two hundred twenty thousand, three hundred thirty".