55287774 has 24 divisors (see below), whose sum is σ = 126837360. Its totient is φ = 17345088.

The previous prime is 55287773. The next prime is 55287811. The reversal of 55287774 is 47778255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55287773) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90034 + ... + 90645.

It is an arithmetic number, because the mean of its divisors is an integer number (5284890).

Almost surely, 2^55287774 is an apocalyptic number.

55287774 is an abundant number, since it is smaller than the sum of its proper divisors (71549586).

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

55287774 is a wasteful number, since it uses less digits than its factorization.

55287774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180704 (or 180701 counting only the distinct ones).

The product of its digits is 548800, while the sum is 45.

The square root of 55287774 is about 7435.5748937120. The cubic root of 55287774 is about 380.9573598094.

The spelling of 55287774 in words is "fifty-five million, two hundred eighty-seven thousand, seven hundred seventy-four".