51456546 has 40 divisors (see below), whose sum is σ = 115974144. Its totient is φ = 17052120.

The previous prime is 51456533. The next prime is 51456551. The reversal of 51456546 is 64565415.

51456546 is a `hidden beast` number, since 51 + 4 + 565 + 46 = 666.

It is a super-2 number, since 2×51456546² = 5295552252500232, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51456546.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 30111 + ... + 31773.

Almost surely, 2^51456546 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51456546, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57987072).

51456546 is an abundant number, since it is smaller than the sum of its proper divisors (64517598).

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

51456546 is a wasteful number, since it uses less digits than its factorization.

51456546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1868 (or 1859 counting only the distinct ones).

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

The square root of 51456546 is about 7173.3218246500. The cubic root of 51456546 is about 371.9462721572.

The spelling of 51456546 in words is "fifty-one million, four hundred fifty-six thousand, five hundred forty-six".