222071261 has 4 divisors (see below), whose sum is σ = 222124224. Its totient is φ = 222018300.

The previous prime is 222071243. The next prime is 222071273. The reversal of 222071261 is 162170222.

It is a happy number.

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 222071261 - 2²² = 217876957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222071281) 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, 19595 + ... + 28776.

It is an arithmetic number, because the mean of its divisors is an integer number (55531056).

Almost surely, 2^222071261 is an apocalyptic number.

It is an amenable number.

222071261 is a deficient number, since it is larger than the sum of its proper divisors (52963).

222071261 is an equidigital number, since it uses as much as digits as its factorization.

222071261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52962.

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 222071261 is about 14902.0555964605. The cubic root of 222071261 is about 605.5696758347.

The spelling of 222071261 in words is "two hundred twenty-two million, seventy-one thousand, two hundred sixty-one".