55403244 has 48 divisors (see below), whose sum is σ = 154691040. Its totient is φ = 17046720.

The previous prime is 55403239. The next prime is 55403261. The reversal of 55403244 is 44230455.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18327 + ... + 21134.

It is an arithmetic number, because the mean of its divisors is an integer number (3222730).

Almost surely, 2^55403244 is an apocalyptic number.

55403244 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

55403244 is an abundant number, since it is smaller than the sum of its proper divisors (99287796).

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

55403244 is a wasteful number, since it uses less digits than its factorization.

55403244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39487 (or 39479 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 55403244 is about 7443.3355426180. The cubic root of 55403244 is about 381.2223886122. Note that the first 3 decimals are identical.

Adding to 55403244 its reverse (44230455), we get a palindrome (99633699).

The spelling of 55403244 in words is "fifty-five million, four hundred three thousand, two hundred forty-four".