222501251 has 4 divisors (see below), whose sum is σ = 254287152. Its totient is φ = 190715352.

The previous prime is 222501247. The next prime is 222501259. The reversal of 222501251 is 152105222.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 222501251 - 2² = 222501247 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222501259) 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, 15892940 + ... + 15892953.

It is an arithmetic number, because the mean of its divisors is an integer number (63571788).

Almost surely, 2^222501251 is an apocalyptic number.

222501251 is a deficient number, since it is larger than the sum of its proper divisors (31785901).

222501251 is an equidigital number, since it uses as much as digits as its factorization.

222501251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31785900.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 222501251 is about 14916.4758237326. The cubic root of 222501251 is about 605.9602727136.

Adding to 222501251 its reverse (152105222), we get a palindrome (374606473).

The spelling of 222501251 in words is "two hundred twenty-two million, five hundred one thousand, two hundred fifty-one".