221232891255 has 32 divisors (see below), whose sum is σ = 358888320000. Its totient is φ = 116355937152.

The previous prime is 221232891251. The next prime is 221232891263. The reversal of 221232891255 is 552198232122.

It is a happy number.

It is not a de Polignac number, because 221232891255 - 2² = 221232891251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221232891251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 867121 + ... + 1092869.

It is an arithmetic number, because the mean of its divisors is an integer number (11215260000).

Almost surely, 2^221232891255 is an apocalyptic number.

221232891255 is a deficient number, since it is larger than the sum of its proper divisors (137655428745).

221232891255 is a wasteful number, since it uses less digits than its factorization.

221232891255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226663.

The product of its digits is 172800, while the sum is 42.

The spelling of 221232891255 in words is "two hundred twenty-one billion, two hundred thirty-two million, eight hundred ninety-one thousand, two hundred fifty-five".