51812442 has 36 divisors (see below), whose sum is σ = 123398730. Its totient is φ = 15700080.

The previous prime is 51812437. The next prime is 51812459. The reversal of 51812442 is 24421815.

It can be written as a sum of positive squares in only one way, i.e., 49406841 + 2405601 = 7029^2 + 1551^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9717 + ... + 14072.

Almost surely, 2^51812442 is an apocalyptic number.

51812442 is an abundant number, since it is smaller than the sum of its proper divisors (71586288).

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

51812442 is a wasteful number, since it uses less digits than its factorization.

51812442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23819 (or 23805 counting only the distinct ones).

The product of its digits is 2560, while the sum is 27.

The square root of 51812442 is about 7198.0859955963. The cubic root of 51812442 is about 372.8018171564.

The spelling of 51812442 in words is "fifty-one million, eight hundred twelve thousand, four hundred forty-two".