51132585172 has 12 divisors (see below), whose sum is σ = 89483607136. Its totient is φ = 25565840280.

The previous prime is 51132585109. The next prime is 51132585191. The reversal of 51132585172 is 27158523115.

It is a happy number.

It is a super-2 number, since 2×51132585172² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 387643 + ... + 502525.

Almost surely, 2^51132585172 is an apocalyptic number.

It is an amenable number.

51132585172 is a deficient number, since it is larger than the sum of its proper divisors (38351021964).

51132585172 is a wasteful number, since it uses less digits than its factorization.

51132585172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226158 (or 226156 counting only the distinct ones).

The product of its digits is 84000, while the sum is 40.

The spelling of 51132585172 in words is "fifty-one billion, one hundred thirty-two million, five hundred eighty-five thousand, one hundred seventy-two".