51845364 has 36 divisors (see below), whose sum is σ = 133207620. Its totient is φ = 16997760.

The previous prime is 51845363. The next prime is 51845383. The reversal of 51845364 is 46354815.

It is a happy number.

51845364 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4235364 + 47610000 = 2058^2 + 6900^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51845363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9609 + ... + 14000.

Almost surely, 2^51845364 is an apocalyptic number.

It is an amenable number.

51845364 is an abundant number, since it is smaller than the sum of its proper divisors (81362256).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51845364 is a wasteful number, since it uses less digits than its factorization.

51845364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23680 (or 23675 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The square root of 51845364 is about 7200.3724903646. The cubic root of 51845364 is about 372.8807607610.

The spelling of 51845364 in words is "fifty-one million, eight hundred forty-five thousand, three hundred sixty-four".