55222451 has 4 divisors (see below), whose sum is σ = 56000304. Its totient is φ = 54444600.

The previous prime is 55222423. The next prime is 55222459. The reversal of 55222451 is 15422255.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15422255 = 5 ⋅3084451.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55222451 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55222451.

It is not an unprimeable number, because it can be changed into a prime (55222459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388820 + ... + 388961.

It is an arithmetic number, because the mean of its divisors is an integer number (14000076).

Almost surely, 2^55222451 is an apocalyptic number.

55222451 is a deficient number, since it is larger than the sum of its proper divisors (777853).

55222451 is an equidigital number, since it uses as much as digits as its factorization.

55222451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 777852.

The product of its digits is 4000, while the sum is 26.

The square root of 55222451 is about 7431.1809963155. The cubic root of 55222451 is about 380.8072658376.

The spelling of 55222451 in words is "fifty-five million, two hundred twenty-two thousand, four hundred fifty-one".