222356261 has 4 divisors (see below), whose sum is σ = 223336032. Its totient is φ = 221376492.

The previous prime is 222356257. The next prime is 222356263. The reversal of 222356261 is 162653222.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 222356261 - 2² = 222356257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222356263) 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, 489545 + ... + 489998.

It is an arithmetic number, because the mean of its divisors is an integer number (55834008).

Almost surely, 2^222356261 is an apocalyptic number.

It is an amenable number.

222356261 is a deficient number, since it is larger than the sum of its proper divisors (979771).

222356261 is an equidigital number, since it uses as much as digits as its factorization.

222356261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979770.

The product of its digits is 8640, while the sum is 29.

The square root of 222356261 is about 14911.6149695464. The cubic root of 222356261 is about 605.8286221119.

The spelling of 222356261 in words is "two hundred twenty-two million, three hundred fifty-six thousand, two hundred sixty-one".