51220002 has 16 divisors (see below), whose sum is σ = 102578112. Its totient is φ = 17050320.

The previous prime is 51219983. The next prime is 51220033. The reversal of 51220002 is 20002215.

It is a self number, because there is not a number n which added to its sum of digits gives 51220002.

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 7 ways as a sum of consecutive naturals, for example, 574 + ... + 10137.

It is an arithmetic number, because the mean of its divisors is an integer number (6411132).

Almost surely, 2^51220002 is an apocalyptic number.

51220002 is an abundant number, since it is smaller than the sum of its proper divisors (51358110).

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

51220002 is a wasteful number, since it uses less digits than its factorization.

51220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11513.

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 51220002 is about 7156.8150737601. The cubic root of 51220002 is about 371.3754551122.

Adding to 51220002 its reverse (20002215), we get a palindrome (71222217).

The spelling of 51220002 in words is "fifty-one million, two hundred twenty thousand, two".