51453745 has 16 divisors (see below), whose sum is σ = 70858368. Its totient is φ = 35136000.

The previous prime is 51453709. The next prime is 51453749. The reversal of 51453745 is 54735415.

It is a de Polignac number, because none of the positive numbers 2^k-51453745 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51453745.

It is not an unprimeable number, because it can be changed into a prime (51453749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5857 + ... + 11713.

It is an arithmetic number, because the mean of its divisors is an integer number (4428648).

Almost surely, 2^51453745 is an apocalyptic number.

51453745 is the 5857-th pentagonal number.

It is an amenable number.

51453745 is a deficient number, since it is larger than the sum of its proper divisors (19404623).

51453745 is a wasteful number, since it uses less digits than its factorization.

51453745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6120.

The product of its digits is 42000, while the sum is 34.

The square root of 51453745 is about 7173.1265846909. The cubic root of 51453745 is about 371.9395231590.

The spelling of 51453745 in words is "fifty-one million, four hundred fifty-three thousand, seven hundred forty-five".