55442750 has 32 divisors (see below), whose sum is σ = 113229792. Its totient is φ = 20160000.

The previous prime is 55442749. The next prime is 55442759. The reversal of 55442750 is 5724455.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55442759) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7331 + ... + 12830.

It is an arithmetic number, because the mean of its divisors is an integer number (3538431).

Almost surely, 2^55442750 is an apocalyptic number.

55442750 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55442750 is an abundant number, since it is smaller than the sum of its proper divisors (57787042).

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

55442750 is a wasteful number, since it uses less digits than its factorization.

55442750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20189 (or 20179 counting only the distinct ones).

The product of its (nonzero) digits is 28000, while the sum is 32.

The square root of 55442750 is about 7445.9888530671. The cubic root of 55442750 is about 381.3129789357.

The spelling of 55442750 in words is "fifty-five million, four hundred forty-two thousand, seven hundred fifty".