55549542 has 16 divisors (see below), whose sum is σ = 111355200. Its totient is φ = 18473832.

The previous prime is 55549537. The next prime is 55549573. The reversal of 55549542 is 24594555.

It is a self number, because there is not a number n which added to its sum of digits gives 55549542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7792 + ... + 13107.

It is an arithmetic number, because the mean of its divisors is an integer number (6959700).

Almost surely, 2^55549542 is an apocalyptic number.

55549542 is an abundant number, since it is smaller than the sum of its proper divisors (55805658).

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

55549542 is a wasteful number, since it uses less digits than its factorization.

55549542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21347.

The product of its digits is 180000, while the sum is 39.

The square root of 55549542 is about 7453.1565125120. The cubic root of 55549542 is about 381.5576460823.

The spelling of 55549542 in words is "fifty-five million, five hundred forty-nine thousand, five hundred forty-two".