51220659 has 16 divisors (see below), whose sum is σ = 78398720. Its totient is φ = 29138400.

The previous prime is 51220639. The next prime is 51220703. The reversal of 51220659 is 95602215.

It is a happy number.

It is not a de Polignac number, because 51220659 - 2¹⁷ = 51089587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51220639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 517 + ... + 10134.

It is an arithmetic number, because the mean of its divisors is an integer number (4899920).

Almost surely, 2^51220659 is an apocalyptic number.

51220659 is a deficient number, since it is larger than the sum of its proper divisors (27178061).

51220659 is a wasteful number, since it uses less digits than its factorization.

51220659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10890.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 51220659 is about 7156.8609739187. The cubic root of 51220659 is about 371.3770429856.

The spelling of 51220659 in words is "fifty-one million, two hundred twenty thousand, six hundred fifty-nine".