51152645 has 4 divisors (see below), whose sum is σ = 61383180. Its totient is φ = 40922112.

The previous prime is 51152603. The next prime is 51152663. The reversal of 51152645 is 54625115.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21548164 + 29604481 = 4642^2 + 5441^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51152645 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5115260 + ... + 5115269.

It is an arithmetic number, because the mean of its divisors is an integer number (15345795).

Almost surely, 2^51152645 is an apocalyptic number.

It is an amenable number.

51152645 is a deficient number, since it is larger than the sum of its proper divisors (10230535).

51152645 is a wasteful number, since it uses less digits than its factorization.

51152645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10230534.

The product of its digits is 6000, while the sum is 29.

The square root of 51152645 is about 7152.1077312915. The cubic root of 51152645 is about 371.2125909394.

The spelling of 51152645 in words is "fifty-one million, one hundred fifty-two thousand, six hundred forty-five".