222478997 has 16 divisors (see below), whose sum is σ = 248935680. Its totient is φ = 197500800.

The previous prime is 222478987. The next prime is 222479009. The reversal of 222478997 is 799874222.

It is a cyclic number.

It is not a de Polignac number, because 222478997 - 2²⁴ = 205701781 is a prime.

It is a super-2 number, since 2×222478997² = 98993808212252018, 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 (222478957) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34904 + ... + 40782.

It is an arithmetic number, because the mean of its divisors is an integer number (15558480).

Almost surely, 2^222478997 is an apocalyptic number.

It is an amenable number.

222478997 is a deficient number, since it is larger than the sum of its proper divisors (26456683).

222478997 is a wasteful number, since it uses less digits than its factorization.

222478997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6004.

The product of its digits is 1016064, while the sum is 50.

The square root of 222478997 is about 14915.7298514018. The cubic root of 222478997 is about 605.9400698467.

The spelling of 222478997 in words is "two hundred twenty-two million, four hundred seventy-eight thousand, nine hundred ninety-seven".