51155366031 has 96 divisors (see below), whose sum is σ = 96195340800. Its totient is φ = 25417002240.

The previous prime is 51155366029. The next prime is 51155366039. The reversal of 51155366031 is 13066355115.

51155366031 is a `hidden beast` number, since 5 + 1 + 15 + 5 + 36 + 603 + 1 = 666.

It is not a de Polignac number, because 51155366031 - 2¹ = 51155366029 is a prime.

It is a super-2 number, since 2×51155366031² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51155366039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2138485 + ... + 2162273.

It is an arithmetic number, because the mean of its divisors is an integer number (1002034800).

Almost surely, 2^51155366031 is an apocalyptic number.

51155366031 is a deficient number, since it is larger than the sum of its proper divisors (45039974769).

51155366031 is a wasteful number, since it uses less digits than its factorization.

51155366031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23949 (or 23946 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The spelling of 51155366031 in words is "fifty-one billion, one hundred fifty-five million, three hundred sixty-six thousand, thirty-one".