51570820022 has 4 divisors (see below), whose sum is σ = 77356230036. Its totient is φ = 25785410010.

The previous prime is 51570819941. The next prime is 51570820043. The reversal of 51570820022 is 22002807515.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12892705004 + ... + 12892705007.

It is an arithmetic number, because the mean of its divisors is an integer number (19339057509).

Almost surely, 2^51570820022 is an apocalyptic number.

51570820022 is a deficient number, since it is larger than the sum of its proper divisors (25785410014).

51570820022 is a wasteful number, since it uses less digits than its factorization.

51570820022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25785410013.

The product of its (nonzero) digits is 11200, while the sum is 32.

The spelling of 51570820022 in words is "fifty-one billion, five hundred seventy million, eight hundred twenty thousand, twenty-two".