51220501050 has 48 divisors (see below), whose sum is σ = 134499016512. Its totient is φ = 12855340800.

The previous prime is 51220501043. The next prime is 51220501051. The reversal of 51220501050 is 5010502215.

It is a super-2 number, since 2×51220501050² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51220501051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10040686 + ... + 10045785.

It is an arithmetic number, because the mean of its divisors is an integer number (2802062844).

Almost surely, 2^51220501050 is an apocalyptic number.

51220501050 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51220501050 is an abundant number, since it is smaller than the sum of its proper divisors (83278515462).

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

51220501050 is a wasteful number, since it uses less digits than its factorization.

51220501050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20086503 (or 20086498 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The spelling of 51220501050 in words is "fifty-one billion, two hundred twenty million, five hundred one thousand, fifty".