55420344 has 48 divisors (see below), whose sum is σ = 171540720. Its totient is φ = 15834240.

The previous prime is 55420331. The next prime is 55420361. The reversal of 55420344 is 44302455.

It is a congruent 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, 54477 + ... + 55484.

It is an arithmetic number, because the mean of its divisors is an integer number (3573765).

Almost surely, 2^55420344 is an apocalyptic number.

It is an amenable number.

55420344 is an abundant number, since it is smaller than the sum of its proper divisors (116120376).

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

55420344 is a wasteful number, since it uses less digits than its factorization.

55420344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109980 (or 109973 counting only the distinct ones).

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

The square root of 55420344 is about 7444.4841325642. The cubic root of 55420344 is about 381.2616055233.

Adding to 55420344 its reverse (44302455), we get a palindrome (99722799).

The spelling of 55420344 in words is "fifty-five million, four hundred twenty thousand, three hundred forty-four".