51669730 has 64 divisors (see below), whose sum is σ = 112803840. Its totient is φ = 16657344.

The previous prime is 51669701. The next prime is 51669731. The reversal of 51669730 is 3796615.

It is a self number, because there is not a number n which added to its sum of digits gives 51669730.

It is not an unprimeable number, because it can be changed into a prime (51669731) 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, 107631 + ... + 108109.

It is an arithmetic number, because the mean of its divisors is an integer number (1762560).

Almost surely, 2^51669730 is an apocalyptic number.

51669730 is an abundant number, since it is smaller than the sum of its proper divisors (61134110).

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

51669730 is a wasteful number, since it uses less digits than its factorization.

51669730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 51669730 is about 7188.1659691468. The cubic root of 51669730 is about 372.4592210964.

The spelling of 51669730 in words is "fifty-one million, six hundred sixty-nine thousand, seven hundred thirty".