221112522 has 24 divisors (see below), whose sum is σ = 494532480. Its totient is φ = 71326440.

The previous prime is 221112457. The next prime is 221112539. The reversal of 221112522 is 225211122.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221112495 and 221112504.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 197572 + ... + 198687.

It is an arithmetic number, because the mean of its divisors is an integer number (20605520).

Almost surely, 2^221112522 is an apocalyptic number.

221112522 is an abundant number, since it is smaller than the sum of its proper divisors (273419958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221112522 is a wasteful number, since it uses less digits than its factorization.

221112522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396298 (or 396295 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 221112522 is about 14869.8527901254. The cubic root of 221112522 is about 604.6969517943.

Adding to 221112522 its reverse (225211122), we get a palindrome (446323644).

The spelling of 221112522 in words is "two hundred twenty-one million, one hundred twelve thousand, five hundred twenty-two".