222716021 has 4 divisors (see below), whose sum is σ = 242962944. Its totient is φ = 202469100.

The previous prime is 222715981. The next prime is 222716029. The reversal of 222716021 is 120617222.

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 a de Polignac number, because none of the positive numbers 2^k-222716021 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 (222716029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10123445 + ... + 10123466.

It is an arithmetic number, because the mean of its divisors is an integer number (60740736).

Almost surely, 2^222716021 is an apocalyptic number.

It is an amenable number.

222716021 is a deficient number, since it is larger than the sum of its proper divisors (20246923).

222716021 is a wasteful number, since it uses less digits than its factorization.

222716021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20246922.

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

The square root of 222716021 is about 14923.6731738537. The cubic root of 222716021 is about 606.1551783397.

The spelling of 222716021 in words is "two hundred twenty-two million, seven hundred sixteen thousand, twenty-one".