222445251 has 48 divisors (see below), whose sum is σ = 385228800. Its totient is φ = 126490896.

The previous prime is 222445231. The next prime is 222445253. The reversal of 222445251 is 152544222.

222445251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 222445251 - 2¹⁰ = 222444227 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (222445253) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 506490 + ... + 506928.

It is an arithmetic number, because the mean of its divisors is an integer number (8025600).

Almost surely, 2^222445251 is an apocalyptic number.

222445251 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

222445251 is a deficient number, since it is larger than the sum of its proper divisors (162783549).

222445251 is a wasteful number, since it uses less digits than its factorization.

222445251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845 (or 832 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 222445251 is about 14914.5985866198. The cubic root of 222445251 is about 605.9094316174.

Adding to 222445251 its reverse (152544222), we get a palindrome (374989473).

It can be divided in two parts, 22244 and 5251, that added together give a triangular number (27495 = T₂₃₄).

The spelling of 222445251 in words is "two hundred twenty-two million, four hundred forty-five thousand, two hundred fifty-one".