51617079 has 12 divisors (see below), whose sum is σ = 75104016. Its totient is φ = 34159392.

The previous prime is 51617057. The next prime is 51617087. The reversal of 51617079 is 97071615.

51617079 is a `hidden beast` number, since 516 + 1 + 70 + 79 = 666.

It is not a de Polignac number, because 51617079 - 2⁹ = 51616567 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51617039) 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, 19699 + ... + 22164.

It is an arithmetic number, because the mean of its divisors is an integer number (6258668).

Almost surely, 2^51617079 is an apocalyptic number.

51617079 is a deficient number, since it is larger than the sum of its proper divisors (23486937).

51617079 is a wasteful number, since it uses less digits than its factorization.

51617079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42006 (or 42003 counting only the distinct ones).

The product of its (nonzero) digits is 13230, while the sum is 36.

The square root of 51617079 is about 7184.5026967773. The cubic root of 51617079 is about 372.3326672117.

The spelling of 51617079 in words is "fifty-one million, six hundred seventeen thousand, seventy-nine".