221151272 has 32 divisors (see below), whose sum is σ = 429235200. Its totient is φ = 106708800.

The previous prime is 221151269. The next prime is 221151277. The reversal of 221151272 is 272151122.

It is not an unprimeable number, because it can be changed into a prime (221151277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105854 + ... + 107922.

It is an arithmetic number, because the mean of its divisors is an integer number (13413600).

Almost surely, 2^221151272 is an apocalyptic number.

It is an amenable number.

221151272 is a deficient number, since it is larger than the sum of its proper divisors (208083928).

221151272 is a wasteful number, since it uses less digits than its factorization.

221151272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2537 (or 2533 counting only the distinct ones).

The product of its digits is 560, while the sum is 23.

The square root of 221151272 is about 14871.1557049209. The cubic root of 221151272 is about 604.7322741390.

The spelling of 221151272 in words is "two hundred twenty-one million, one hundred fifty-one thousand, two hundred seventy-two".