51055430031 has 20 divisors (see below), whose sum is σ = 78128187984. Its totient is φ = 33206781600.

The previous prime is 51055430003. The next prime is 51055430033. The reversal of 51055430031 is 13003455015.

51055430031 is a `hidden beast` number, since 51 + 0 + 554 + 30 + 0 + 31 = 666.

It is not a de Polignac number, because 51055430031 - 2⁷ = 51055429903 is a prime.

It is a super-2 number, since 2×51055430031² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 51055429977 and 51055430004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51055430033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 7683435 + ... + 7690076.

Almost surely, 2^51055430031 is an apocalyptic number.

51055430031 is a deficient number, since it is larger than the sum of its proper divisors (27072757953).

51055430031 is a wasteful number, since it uses less digits than its factorization.

51055430031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15373564 (or 15373555 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

Adding to 51055430031 its reverse (13003455015), we get a palindrome (64058885046).

The spelling of 51055430031 in words is "fifty-one billion, fifty-five million, four hundred thirty thousand, thirty-one".