51545466 has 48 divisors (see below), whose sum is σ = 128142144. Its totient is φ = 14668992.

The previous prime is 51545449. The next prime is 51545471. The reversal of 51545466 is 66454515.

51545466 is a `hidden beast` number, since 51 + 545 + 4 + 66 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 51545466.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38785 + ... + 40091.

It is an arithmetic number, because the mean of its divisors is an integer number (2669628).

Almost surely, 2^51545466 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51545466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64071072).

51545466 is an abundant number, since it is smaller than the sum of its proper divisors (76596678).

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

51545466 is a wasteful number, since it uses less digits than its factorization.

51545466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635 (or 1632 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 51545466 is about 7179.5171146812. The cubic root of 51545466 is about 372.1603973585.

The spelling of 51545466 in words is "fifty-one million, five hundred forty-five thousand, four hundred sixty-six".