51508959 has 8 divisors (see below), whose sum is σ = 71046960. Its totient is φ = 33155136.

The previous prime is 51508957. The next prime is 51508987. The reversal of 51508959 is 95980515.

It is a happy number.

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

It is not a de Polignac number, because 51508959 - 2¹ = 51508957 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 51508959.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51508957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 295942 + ... + 296115.

It is an arithmetic number, because the mean of its divisors is an integer number (8880870).

Almost surely, 2^51508959 is an apocalyptic number.

51508959 is a deficient number, since it is larger than the sum of its proper divisors (19538001).

51508959 is a wasteful number, since it uses less digits than its factorization.

51508959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592089.

The product of its (nonzero) digits is 81000, while the sum is 42.

The square root of 51508959 is about 7176.9742231668. The cubic root of 51508959 is about 372.0725159244.

The spelling of 51508959 in words is "fifty-one million, five hundred eight thousand, nine hundred fifty-nine".