222872649 has 4 divisors (see below), whose sum is σ = 297163536. Its totient is φ = 148581764.

The previous prime is 222872633. The next prime is 222872651. The reversal of 222872649 is 946278222.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 222872649 - 2⁴ = 222872633 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 222872649.

It is not an unprimeable number, because it can be changed into a prime (222872549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37145439 + ... + 37145444.

It is an arithmetic number, because the mean of its divisors is an integer number (74290884).

Almost surely, 2^222872649 is an apocalyptic number.

It is an amenable number.

222872649 is a deficient number, since it is larger than the sum of its proper divisors (74290887).

222872649 is an equidigital number, since it uses as much as digits as its factorization.

222872649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74290886.

The product of its digits is 193536, while the sum is 42.

The square root of 222872649 is about 14928.9198872524. The cubic root of 222872649 is about 606.2972406026.

The spelling of 222872649 in words is "two hundred twenty-two million, eight hundred seventy-two thousand, six hundred forty-nine".