51201557272 has 16 divisors (see below), whose sum is σ = 100176960240. Its totient is φ = 24487701216.

The previous prime is 51201557207. The next prime is 51201557273. The reversal of 51201557272 is 27275510215.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51201557273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139134483 + ... + 139134850.

It is an arithmetic number, because the mean of its divisors is an integer number (6261060015).

Almost surely, 2^51201557272 is an apocalyptic number.

It is an amenable number.

51201557272 is a deficient number, since it is larger than the sum of its proper divisors (48975402968).

51201557272 is a wasteful number, since it uses less digits than its factorization.

51201557272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278269362 (or 278269358 counting only the distinct ones).

The product of its (nonzero) digits is 49000, while the sum is 37.

The spelling of 51201557272 in words is "fifty-one billion, two hundred one million, five hundred fifty-seven thousand, two hundred seventy-two".