51285546 has 24 divisors (see below), whose sum is σ = 119666820. Its totient is φ = 15780096.

The previous prime is 51285529. The next prime is 51285569. The reversal of 51285546 is 64558215.

It can be written as a sum of positive squares in 2 ways, for example, as 51279921 + 5625 = 7161^2 + 75^2 .

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 51285546.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109351 + ... + 109818.

Almost surely, 2^51285546 is an apocalyptic number.

51285546 is an abundant number, since it is smaller than the sum of its proper divisors (68381274).

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

51285546 is a wasteful number, since it uses less digits than its factorization.

51285546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219190 (or 219187 counting only the distinct ones).

The product of its digits is 48000, while the sum is 36.

The square root of 51285546 is about 7161.3927416390. The cubic root of 51285546 is about 371.5337985742.

The spelling of 51285546 in words is "fifty-one million, two hundred eighty-five thousand, five hundred forty-six".