51322020 has 48 divisors (see below), whose sum is σ = 146422080. Its totient is φ = 13426816.

The previous prime is 51322009. The next prime is 51322049. The reversal of 51322020 is 2022315.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4890 + ... + 11249.

It is an arithmetic number, because the mean of its divisors is an integer number (3050460).

Almost surely, 2^51322020 is an apocalyptic number.

It is an amenable number.

51322020 is an abundant number, since it is smaller than the sum of its proper divisors (95100060).

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

51322020 is a wasteful number, since it uses less digits than its factorization.

51322020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16204 (or 16202 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 51322020 is about 7163.9388607106. The cubic root of 51322020 is about 371.6218553046.

Adding to 51322020 its reverse (2022315), we get a palindrome (53344335).

The spelling of 51322020 in words is "fifty-one million, three hundred twenty-two thousand, twenty".