55209456 has 30 divisors (see below), whose sum is σ = 154510200. Its totient is φ = 18403104.

The previous prime is 55209437. The next prime is 55209457. The reversal of 55209456 is 65490255.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 55209456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55209457) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 191556 + ... + 191843.

It is an arithmetic number, because the mean of its divisors is an integer number (5150340).

Almost surely, 2^55209456 is an apocalyptic number.

It is an amenable number.

55209456 is an abundant number, since it is smaller than the sum of its proper divisors (99300744).

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

55209456 is a wasteful number, since it uses less digits than its factorization.

55209456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383413 (or 383404 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 55209456 is about 7430.3065885601. The cubic root of 55209456 is about 380.7773928509. Note that the first 3 decimals are identical.

The spelling of 55209456 in words is "fifty-five million, two hundred nine thousand, four hundred fifty-six".