222908491 has 8 divisors (see below), whose sum is σ = 240383024. Its totient is φ = 205480800.

The previous prime is 222908489. The next prime is 222908501. The reversal of 222908491 is 194809222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222908491 - 2¹ = 222908489 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222908491.

It is not an unprimeable number, because it can be changed into a prime (222908401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1485 + ... + 21166.

It is an arithmetic number, because the mean of its divisors is an integer number (30047878).

Almost surely, 2^222908491 is an apocalyptic number.

222908491 is a deficient number, since it is larger than the sum of its proper divisors (17474533).

222908491 is a wasteful number, since it uses less digits than its factorization.

222908491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23421.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 222908491 is about 14930.1202607347. The cubic root of 222908491 is about 606.3297400906.

The spelling of 222908491 in words is "two hundred twenty-two million, nine hundred eight thousand, four hundred ninety-one".