221054164 has 6 divisors (see below), whose sum is σ = 386844794. Its totient is φ = 110527080.

The previous prime is 221054161. The next prime is 221054167. The reversal of 221054164 is 461450122.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (221054161) and next prime (221054167).

It can be written as a sum of positive squares in only one way, i.e., 190716100 + 30338064 = 13810^2 + 5508^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221054161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27631767 + ... + 27631774.

Almost surely, 2^221054164 is an apocalyptic number.

It is an amenable number.

221054164 is a deficient number, since it is larger than the sum of its proper divisors (165790630).

221054164 is a wasteful number, since it uses less digits than its factorization.

221054164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55263545 (or 55263543 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 221054164 is about 14867.8903681726. The cubic root of 221054164 is about 604.6437480989.

The spelling of 221054164 in words is "two hundred twenty-one million, fifty-four thousand, one hundred sixty-four".