93144221 has 4 divisors (see below), whose sum is σ = 93769500. Its totient is φ = 92518944.

The previous prime is 93144217. The next prime is 93144223. The reversal of 93144221 is 12244139.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24900100 + 68244121 = 4990^2 + 8261^2 .

It is a cyclic number.

It is not a de Polignac number, because 93144221 - 2² = 93144217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (93144223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312416 + ... + 312713.

It is an arithmetic number, because the mean of its divisors is an integer number (23442375).

Almost surely, 2^93144221 is an apocalyptic number.

It is an amenable number.

93144221 is a deficient number, since it is larger than the sum of its proper divisors (625279).

93144221 is a wasteful number, since it uses less digits than its factorization.

93144221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625278.

The product of its digits is 1728, while the sum is 26.

The square root of 93144221 is about 9651.1253747944. The cubic root of 93144221 is about 453.2995677826.

The spelling of 93144221 in words is "ninety-three million, one hundred forty-four thousand, two hundred twenty-one".