51449625 has 96 divisors (see below), whose sum is σ = 102211200. Its totient is φ = 24796800.

The previous prime is 51449623. The next prime is 51449669. The reversal of 51449625 is 52694415.

It is not a de Polignac number, because 51449625 - 2¹ = 51449623 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51449625.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51449623) 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 95 ways as a sum of consecutive naturals, for example, 619834 + ... + 619916.

It is an arithmetic number, because the mean of its divisors is an integer number (1064700).

Almost surely, 2^51449625 is an apocalyptic number.

It is an amenable number.

51449625 is a deficient number, since it is larger than the sum of its proper divisors (50761575).

51449625 is a wasteful number, since it uses less digits than its factorization.

51449625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 139 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 51449625 is about 7172.8393959436. The cubic root of 51449625 is about 371.9295955905.

The spelling of 51449625 in words is "fifty-one million, four hundred forty-nine thousand, six hundred twenty-five".