222645513 has 4 divisors (see below), whose sum is σ = 296860688. Its totient is φ = 148430340.

The previous prime is 222645509. The next prime is 222645517. The reversal of 222645513 is 315546222.

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 an interprime number because it is at equal distance from previous prime (222645509) and next prime (222645517).

It is not a de Polignac number, because 222645513 - 2² = 222645509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222645517) 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, 37107583 + ... + 37107588.

It is an arithmetic number, because the mean of its divisors is an integer number (74215172).

Almost surely, 2^222645513 is an apocalyptic number.

It is an amenable number.

222645513 is a deficient number, since it is larger than the sum of its proper divisors (74215175).

222645513 is an equidigital number, since it uses as much as digits as its factorization.

222645513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74215174.

The product of its digits is 14400, while the sum is 30.

The square root of 222645513 is about 14921.3106998011. The cubic root of 222645513 is about 606.0912055429.

The spelling of 222645513 in words is "two hundred twenty-two million, six hundred forty-five thousand, five hundred thirteen".