51172737 has 64 divisors (see below), whose sum is σ = 91736064. Its totient is φ = 24560640.

The previous prime is 51172729. The next prime is 51172777. The reversal of 51172737 is 73727115.

It is not a de Polignac number, because 51172737 - 2³ = 51172729 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 51172698 and 51172707.

It is not an unprimeable number, because it can be changed into a prime (51172727) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 325863 + ... + 326019.

It is an arithmetic number, because the mean of its divisors is an integer number (1433376).

Almost surely, 2^51172737 is an apocalyptic number.

It is an amenable number.

51172737 is a deficient number, since it is larger than the sum of its proper divisors (40563327).

51172737 is a wasteful number, since it uses less digits than its factorization.

51172737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278.

The product of its digits is 10290, while the sum is 33.

The square root of 51172737 is about 7153.5122142903. The cubic root of 51172737 is about 371.2611868434.

It can be divided in two parts, 5 and 1172737, that multiplied together give a palindrome (5863685).

The spelling of 51172737 in words is "fifty-one million, one hundred seventy-two thousand, seven hundred thirty-seven".