51916599 has 32 divisors (see below), whose sum is σ = 90746880. Its totient is φ = 28706400.

The previous prime is 51916597. The next prime is 51916643. The reversal of 51916599 is 99561915.

It is a happy number.

51916599 is a `hidden beast` number, since 51 + 9 + 1 + 6 + 599 = 666.

It is not a de Polignac number, because 51916599 - 2¹ = 51916597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51916597) 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, 1429 + ... + 10289.

It is an arithmetic number, because the mean of its divisors is an integer number (2835840).

Almost surely, 2^51916599 is an apocalyptic number.

51916599 is a deficient number, since it is larger than the sum of its proper divisors (38830281).

51916599 is a wasteful number, since it uses less digits than its factorization.

51916599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8908 (or 8902 counting only the distinct ones).

The product of its digits is 109350, while the sum is 45.

The square root of 51916599 is about 7205.3174114677. The cubic root of 51916599 is about 373.0514607224.

The spelling of 51916599 in words is "fifty-one million, nine hundred sixteen thousand, five hundred ninety-nine".