221254132 has 24 divisors (see below), whose sum is σ = 422795520. Its totient is φ = 100474560.

The previous prime is 221254097. The next prime is 221254139. The reversal of 221254132 is 231452122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221254139) 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, 67344 + ... + 70552.

It is an arithmetic number, because the mean of its divisors is an integer number (17616480).

Almost surely, 2^221254132 is an apocalyptic number.

221254132 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

221254132 is a deficient number, since it is larger than the sum of its proper divisors (201541388).

221254132 is a wasteful number, since it uses less digits than its factorization.

221254132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4791 (or 4789 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 221254132 is about 14874.6136756556. The cubic root of 221254132 is about 604.8260155856.

The spelling of 221254132 in words is "two hundred twenty-one million, two hundred fifty-four thousand, one hundred thirty-two".