222215101 has 4 divisors (see below), whose sum is σ = 222281532. Its totient is φ = 222148672.

The previous prime is 222215087. The next prime is 222215113. The reversal of 222215101 is 101512222.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 165739876 + 56475225 = 12874^2 + 7515^2 .

It is a cyclic number.

It is not a de Polignac number, because 222215101 - 2⁹ = 222214589 is a prime.

It is a super-2 number, since 2×222215101² = 98759102224880402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222215171) 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, 27916 + ... + 34981.

It is an arithmetic number, because the mean of its divisors is an integer number (55570383).

Almost surely, 2^222215101 is an apocalyptic number.

It is an amenable number.

222215101 is a deficient number, since it is larger than the sum of its proper divisors (66431).

222215101 is an equidigital number, since it uses as much as digits as its factorization.

222215101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66430.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 222215101 is about 14906.8809950304. The cubic root of 222215101 is about 605.7003941485.

Adding to 222215101 its reverse (101512222), we get a palindrome (323727323).

The spelling of 222215101 in words is "two hundred twenty-two million, two hundred fifteen thousand, one hundred one".