51995387 has 8 divisors (see below), whose sum is σ = 54328320. Its totient is φ = 49668520.

The previous prime is 51995369. The next prime is 51995399. The reversal of 51995387 is 78359915.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51995387 - 2⁸ = 51995131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51995087) 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, 32312 + ... + 33882.

It is an arithmetic number, because the mean of its divisors is an integer number (6791040).

Almost surely, 2^51995387 is an apocalyptic number.

51995387 is a deficient number, since it is larger than the sum of its proper divisors (2332933).

51995387 is a wasteful number, since it uses less digits than its factorization.

51995387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033.

The product of its digits is 340200, while the sum is 47.

The square root of 51995387 is about 7210.7826898333. The cubic root of 51995387 is about 373.2400781284.

The spelling of 51995387 in words is "fifty-one million, nine hundred ninety-five thousand, three hundred eighty-seven".