222931749 has 4 divisors (see below), whose sum is σ = 297242336. Its totient is φ = 148621164.

The previous prime is 222931747. The next prime is 222931781. The reversal of 222931749 is 947139222.

222931749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is not a de Polignac number, because 222931749 - 2¹ = 222931747 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222931741) 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, 37155289 + ... + 37155294.

It is an arithmetic number, because the mean of its divisors is an integer number (74310584).

Almost surely, 2^222931749 is an apocalyptic number.

It is an amenable number.

222931749 is a deficient number, since it is larger than the sum of its proper divisors (74310587).

222931749 is an equidigital number, since it uses as much as digits as its factorization.

222931749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74310586.

The product of its digits is 54432, while the sum is 39.

The square root of 222931749 is about 14930.8991356850. The cubic root of 222931749 is about 606.3508272590.

It can be divided in two parts, 22293 and 1749, that added together give a palindrome (24042).

The spelling of 222931749 in words is "two hundred twenty-two million, nine hundred thirty-one thousand, seven hundred forty-nine".