51551450152 has 8 divisors (see below), whose sum is σ = 96658969050. Its totient is φ = 25775725072.

The previous prime is 51551450149. The next prime is 51551450189. The reversal of 51551450152 is 25105415515.

It can be written as a sum of positive squares in only one way, i.e., 48107403556 + 3444046596 = 219334^2 + 58686^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3221965627 + ... + 3221965642.

Almost surely, 2^51551450152 is an apocalyptic number.

It is an amenable number.

51551450152 is a deficient number, since it is larger than the sum of its proper divisors (45107518898).

51551450152 is a wasteful number, since it uses less digits than its factorization.

51551450152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6443931275 (or 6443931271 counting only the distinct ones).

The product of its (nonzero) digits is 25000, while the sum is 34.

Adding to 51551450152 its reverse (25105415515), we get a palindrome (76656865667).

The spelling of 51551450152 in words is "fifty-one billion, five hundred fifty-one million, four hundred fifty thousand, one hundred fifty-two".