51601599 has 12 divisors (see below), whose sum is σ = 85183696. Its totient is φ = 29486592.

The previous prime is 51601567. The next prime is 51601601. The reversal of 51601599 is 99510615.

51601599 is a `hidden beast` number, since 5 + 1 + 60 + 1 + 599 = 666.

It is not a de Polignac number, because 51601599 - 2⁵ = 51601567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51601519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 409474 + ... + 409599.

Almost surely, 2^51601599 is an apocalyptic number.

51601599 is a deficient number, since it is larger than the sum of its proper divisors (33582097).

51601599 is a wasteful number, since it uses less digits than its factorization.

51601599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819086 (or 819083 counting only the distinct ones).

The product of its (nonzero) digits is 12150, while the sum is 36.

The square root of 51601599 is about 7183.4252971685. The cubic root of 51601599 is about 372.2954425432.

The spelling of 51601599 in words is "fifty-one million, six hundred one thousand, five hundred ninety-nine".