51505531106 has 8 divisors (see below), whose sum is σ = 79142645484. Its totient is φ = 25124649280.

The previous prime is 51505531087. The next prime is 51505531117. The reversal of 51505531106 is 60113550515.

It can be written as a sum of positive squares in 2 ways, for example, as 48790183225 + 2715347881 = 220885^2 + 52109^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×51505531106² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 314058035 + ... + 314058198.

Almost surely, 2^51505531106 is an apocalyptic number.

51505531106 is a deficient number, since it is larger than the sum of its proper divisors (27637114378).

51505531106 is a wasteful number, since it uses less digits than its factorization.

51505531106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 628116276.

The product of its (nonzero) digits is 11250, while the sum is 32.

The spelling of 51505531106 in words is "fifty-one billion, five hundred five million, five hundred thirty-one thousand, one hundred six".