51920351 has 6 divisors (see below), whose sum is σ = 60397200. Its totient is φ = 44503116.

The previous prime is 51920339. The next prime is 51920389. The reversal of 51920351 is 15302915.

It is not a de Polignac number, because 51920351 - 2²² = 47726047 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 51920351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51920251) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 529751 + ... + 529848.

It is an arithmetic number, because the mean of its divisors is an integer number (10066200).

Almost surely, 2^51920351 is an apocalyptic number.

51920351 is a deficient number, since it is larger than the sum of its proper divisors (8476849).

51920351 is a wasteful number, since it uses less digits than its factorization.

51920351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1059613 (or 1059606 counting only the distinct ones).

The product of its (nonzero) digits is 1350, while the sum is 26.

The square root of 51920351 is about 7205.5777700334. The cubic root of 51920351 is about 373.0604472854.

The spelling of 51920351 in words is "fifty-one million, nine hundred twenty thousand, three hundred fifty-one".