221453164 has 12 divisors (see below), whose sum is σ = 400906800. Its totient is φ = 106908368.

The previous prime is 221453161. The next prime is 221453173. The reversal of 221453164 is 461354122.

It is a super-2 number, since 2×221453164² = 98083007691221792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221453161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 954424 + ... + 954655.

It is an arithmetic number, because the mean of its divisors is an integer number (33408900).

Almost surely, 2^221453164 is an apocalyptic number.

It is an amenable number.

221453164 is a deficient number, since it is larger than the sum of its proper divisors (179453636).

221453164 is a wasteful number, since it uses less digits than its factorization.

221453164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1909112 (or 1909110 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 221453164 is about 14881.3024967575. The cubic root of 221453164 is about 605.0073209050.

The spelling of 221453164 in words is "two hundred twenty-one million, four hundred fifty-three thousand, one hundred sixty-four".