51900641 has 4 divisors (see below), whose sum is σ = 55893012. Its totient is φ = 47908272.

The previous prime is 51900623. The next prime is 51900649. The reversal of 51900641 is 14600915.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7398400 + 44502241 = 2720^2 + 6671^2 .

It is a cyclic number.

It is not a de Polignac number, because 51900641 - 2⁶ = 51900577 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51900641.

It is not an unprimeable number, because it can be changed into a prime (51900649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1996166 + ... + 1996191.

It is an arithmetic number, because the mean of its divisors is an integer number (13973253).

Almost surely, 2^51900641 is an apocalyptic number.

It is an amenable number.

51900641 is a deficient number, since it is larger than the sum of its proper divisors (3992371).

51900641 is a wasteful number, since it uses less digits than its factorization.

51900641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3992370.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 51900641 is about 7204.2099497447. The cubic root of 51900641 is about 373.0132342503.

The spelling of 51900641 in words is "fifty-one million, nine hundred thousand, six hundred forty-one".