51551470388 has 24 divisors (see below), whose sum is σ = 98779626624. Its totient is φ = 23346014400.

The previous prime is 51551470387. The next prime is 51551470391. The reversal of 51551470388 is 88307415515.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51551470387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2149745 + ... + 2173592.

It is an arithmetic number, because the mean of its divisors is an integer number (4115817776).

Almost surely, 2^51551470388 is an apocalyptic number.

It is an amenable number.

51551470388 is a deficient number, since it is larger than the sum of its proper divisors (47228156236).

51551470388 is a wasteful number, since it uses less digits than its factorization.

51551470388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4323623 (or 4323621 counting only the distinct ones).

The product of its (nonzero) digits is 672000, while the sum is 47.

The spelling of 51551470388 in words is "fifty-one billion, five hundred fifty-one million, four hundred seventy thousand, three hundred eighty-eight".