51220807384 has 32 divisors (see below), whose sum is σ = 97928028000. Its totient is φ = 25107427072.

The previous prime is 51220807361. The next prime is 51220807483. The reversal of 51220807384 is 48370802215.

It is a happy number.

It is a super-4 number, since 4×51220807384⁴ (a number of 44 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 499677 + ... + 593395.

It is an arithmetic number, because the mean of its divisors is an integer number (3060250875).

Almost surely, 2^51220807384 is an apocalyptic number.

It is an amenable number.

51220807384 is a deficient number, since it is larger than the sum of its proper divisors (46707220616).

51220807384 is a wasteful number, since it uses less digits than its factorization.

51220807384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95067 (or 95063 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 40.

The spelling of 51220807384 in words is "fifty-one billion, two hundred twenty million, eight hundred seven thousand, three hundred eighty-four".