51899647 has 8 divisors (see below), whose sum is σ = 54036000. Its totient is φ = 49786464.

The previous prime is 51899633. The next prime is 51899671. The reversal of 51899647 is 74699815.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51899647 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 51899647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51899677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1147 + ... + 10252.

It is an arithmetic number, because the mean of its divisors is an integer number (6754500).

Almost surely, 2^51899647 is an apocalyptic number.

51899647 is a deficient number, since it is larger than the sum of its proper divisors (2136353).

51899647 is a wasteful number, since it uses less digits than its factorization.

51899647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11585.

The product of its digits is 544320, while the sum is 49.

The square root of 51899647 is about 7204.1409619746. The cubic root of 51899647 is about 373.0108529211.

The spelling of 51899647 in words is "fifty-one million, eight hundred ninety-nine thousand, six hundred forty-seven".