222161555 has 16 divisors (see below), whose sum is σ = 332377344. Its totient is φ = 138490080.

The previous prime is 222161549. The next prime is 222161561. The reversal of 222161555 is 555161222.

It is an interprime number because it is at equal distance from previous prime (222161549) and next prime (222161561).

It is not a de Polignac number, because 222161555 - 2⁸ = 222161299 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288137 + ... + 288906.

It is an arithmetic number, because the mean of its divisors is an integer number (20773584).

Almost surely, 2^222161555 is an apocalyptic number.

222161555 is a deficient number, since it is larger than the sum of its proper divisors (110215789).

222161555 is a wasteful number, since it uses less digits than its factorization.

222161555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 577066.

The product of its digits is 6000, while the sum is 29.

The square root of 222161555 is about 14905.0848706071. The cubic root of 222161555 is about 605.6517394313.

The spelling of 222161555 in words is "two hundred twenty-two million, one hundred sixty-one thousand, five hundred fifty-five".