222155545 has 8 divisors (see below), whose sum is σ = 267969096. Its totient is φ = 176802816.

The previous prime is 222155537. The next prime is 222155561. The reversal of 222155545 is 545551222.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16548624 + 205606921 = 4068^2 + 14339^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222155545 - 2³ = 222155537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114142 + ... + 116071.

It is an arithmetic number, because the mean of its divisors is an integer number (33496137).

Almost surely, 2^222155545 is an apocalyptic number.

It is an amenable number.

222155545 is a deficient number, since it is larger than the sum of its proper divisors (45813551).

222155545 is a wasteful number, since it uses less digits than its factorization.

222155545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230411.

The product of its digits is 20000, while the sum is 31.

The square root of 222155545 is about 14904.8832601936. The cubic root of 222155545 is about 605.6462779406.

The spelling of 222155545 in words is "two hundred twenty-two million, one hundred fifty-five thousand, five hundred forty-five".