902222221 has 4 divisors (see below), whose sum is σ = 902304352. Its totient is φ = 902140092.

The previous prime is 902222197. The next prime is 902222231. The reversal of 902222221 is 122222209.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 902222221 - 2²¹ = 900125069 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 902222192 and 902222201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (902222231) 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, 21471 + ... + 47596.

It is an arithmetic number, because the mean of its divisors is an integer number (225576088).

Almost surely, 2^902222221 is an apocalyptic number.

It is an amenable number.

902222221 is a deficient number, since it is larger than the sum of its proper divisors (82131).

902222221 is a wasteful number, since it uses less digits than its factorization.

902222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82130.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 902222221 is about 30037.0141825049. The cubic root of 902222221 is about 966.2833725079.

The spelling of 902222221 in words is "nine hundred two million, two hundred twenty-two thousand, two hundred twenty-one".