55222401 has 16 divisors (see below), whose sum is σ = 79591680. Its totient is φ = 33855360.

The previous prime is 55222399. The next prime is 55222403. The reversal of 55222401 is 10422255.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (55222399) and next prime (55222403).

It is not a de Polignac number, because 55222401 - 2¹ = 55222399 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55222403) 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, 8440 + ... + 13478.

It is an arithmetic number, because the mean of its divisors is an integer number (4974480).

Almost surely, 2^55222401 is an apocalyptic number.

It is an amenable number.

55222401 is a deficient number, since it is larger than the sum of its proper divisors (24369279).

55222401 is a wasteful number, since it uses less digits than its factorization.

55222401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5336.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 55222401 is about 7431.1776321119. The cubic root of 55222401 is about 380.8071509063.

Adding to 55222401 its reverse (10422255), we get a palindrome (65644656).

The spelling of 55222401 in words is "fifty-five million, two hundred twenty-two thousand, four hundred one".