222125409 has 40 divisors (see below), whose sum is σ = 381062880. Its totient is φ = 127526400.

The previous prime is 222125389. The next prime is 222125411. The reversal of 222125409 is 904521222.

It is a happy number.

It is not a de Polignac number, because 222125409 - 2⁵ = 222125377 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (222125419) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10369 + ... + 23489.

It is an arithmetic number, because the mean of its divisors is an integer number (9526572).

Almost surely, 2^222125409 is an apocalyptic number.

It is an amenable number.

222125409 is a deficient number, since it is larger than the sum of its proper divisors (158937471).

222125409 is a wasteful number, since it uses less digits than its factorization.

222125409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13163 (or 13154 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 222125409 is about 14903.8722820615. The cubic root of 222125409 is about 605.6188908508.

The spelling of 222125409 in words is "two hundred twenty-two million, one hundred twenty-five thousand, four hundred nine".