222537213 has 48 divisors (see below), whose sum is σ = 360097920. Its totient is φ = 136914624.

The previous prime is 222537181. The next prime is 222537221. The reversal of 222537213 is 312735222.

It is a happy number.

It is not a de Polignac number, because 222537213 - 2⁵ = 222537181 is a prime.

It is a super-2 number, since 2×222537213² = 99045622339614738, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222537223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 161395 + ... + 162767.

It is an arithmetic number, because the mean of its divisors is an integer number (7502040).

Almost surely, 2^222537213 is an apocalyptic number.

222537213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

222537213 is a deficient number, since it is larger than the sum of its proper divisors (137560707).

222537213 is a wasteful number, since it uses less digits than its factorization.

222537213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1440 (or 1428 counting only the distinct ones).

The product of its digits is 5040, while the sum is 27.

The square root of 222537213 is about 14917.6812206187. The cubic root of 222537213 is about 605.9929172783.

The spelling of 222537213 in words is "two hundred twenty-two million, five hundred thirty-seven thousand, two hundred thirteen".