51220008 has 48 divisors (see below), whose sum is σ = 158539680. Its totient is φ = 14634144.

The previous prime is 51219983. The next prime is 51220033. The reversal of 51220008 is 80002215.

It is an interprime number because it is at equal distance from previous prime (51219983) and next prime (51220033).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50310 + ... + 51317.

It is an arithmetic number, because the mean of its divisors is an integer number (3302910).

Almost surely, 2^51220008 is an apocalyptic number.

It is an amenable number.

51220008 is an abundant number, since it is smaller than the sum of its proper divisors (107319672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51220008 is a wasteful number, since it uses less digits than its factorization.

51220008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101646 (or 101639 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 51220008 is about 7156.8154929410. The cubic root of 51220008 is about 371.3754696134.

The spelling of 51220008 in words is "fifty-one million, two hundred twenty thousand, eight".