55220416 has 14 divisors (see below), whose sum is σ = 109578140. Its totient is φ = 27610176.

The previous prime is 55220413. The next prime is 55220419. The reversal of 55220416 is 61402255.

It is an interprime number because it is at equal distance from previous prime (55220413) and next prime (55220419).

It is not an unprimeable number, because it can be changed into a prime (55220413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431346 + ... + 431473.

It is an arithmetic number, because the mean of its divisors is an integer number (7827010).

Almost surely, 2^55220416 is an apocalyptic number.

It is an amenable number.

55220416 is a deficient number, since it is larger than the sum of its proper divisors (54357724).

55220416 is an equidigital number, since it uses as much as digits as its factorization.

55220416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862831 (or 862821 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 55220416 is about 7431.0440719996. The cubic root of 55220416 is about 380.8025880765.

The spelling of 55220416 in words is "fifty-five million, two hundred twenty thousand, four hundred sixteen".