55220455 has 8 divisors (see below), whose sum is σ = 68402304. Its totient is φ = 42751200.

The previous prime is 55220419. The next prime is 55220491. The reversal of 55220455 is 55402255.

It is an interprime number because it is at equal distance from previous prime (55220419) and next prime (55220491).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55220455 - 2¹⁵ = 55187687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177976 + ... + 178285.

It is an arithmetic number, because the mean of its divisors is an integer number (8550288).

Almost surely, 2^55220455 is an apocalyptic number.

55220455 is a deficient number, since it is larger than the sum of its proper divisors (13181849).

55220455 is a wasteful number, since it uses less digits than its factorization.

55220455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356297.

The product of its (nonzero) digits is 10000, while the sum is 28.

The square root of 55220455 is about 7431.0466961257. The cubic root of 55220455 is about 380.8026777251.

The spelling of 55220455 in words is "fifty-five million, two hundred twenty thousand, four hundred fifty-five".