222564640 has 24 divisors (see below), whose sum is σ = 525809340. Its totient is φ = 89025792.

The previous prime is 222564637. The next prime is 222564653. The reversal of 222564640 is 46465222.

It can be written as a sum of positive squares in 2 ways, for example, as 210482064 + 12082576 = 14508^2 + 3476^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 695355 + ... + 695674.

Almost surely, 2^222564640 is an apocalyptic number.

222564640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

222564640 is an abundant number, since it is smaller than the sum of its proper divisors (303244700).

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

222564640 is a wasteful number, since it uses less digits than its factorization.

222564640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391044 (or 1391036 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

The square root of 222564640 is about 14918.6004705535. The cubic root of 222564640 is about 606.0178118188.

It can be divided in two parts, 22256 and 4640, that added together give a square (26896 = 164²).

The spelling of 222564640 in words is "two hundred twenty-two million, five hundred sixty-four thousand, six hundred forty".