51543522 has 24 divisors (see below), whose sum is σ = 112535280. Its totient is φ = 17049240.

The previous prime is 51543517. The next prime is 51543533. The reversal of 51543522 is 22534515.

It is a happy number.

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, 8572 + ... + 13287.

It is an arithmetic number, because the mean of its divisors is an integer number (4688970).

Almost surely, 2^51543522 is an apocalyptic number.

51543522 is an abundant number, since it is smaller than the sum of its proper divisors (60991758).

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

51543522 is a wasteful number, since it uses less digits than its factorization.

51543522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21998 (or 21995 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 51543522 is about 7179.3817282549. The cubic root of 51543522 is about 372.1557187129.

The spelling of 51543522 in words is "fifty-one million, five hundred forty-three thousand, five hundred twenty-two".