93218381 has 4 divisors (see below), whose sum is σ = 93952512. Its totient is φ = 92484252.

The previous prime is 93218371. The next prime is 93218387. The reversal of 93218381 is 18381239.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 93218381 - 2²² = 89024077 is a prime.

It is a super-2 number, since 2×93218381² = 17379333112522322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (93218387) 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, 366875 + ... + 367128.

It is an arithmetic number, because the mean of its divisors is an integer number (23488128).

Almost surely, 2^93218381 is an apocalyptic number.

It is an amenable number.

93218381 is a deficient number, since it is larger than the sum of its proper divisors (734131).

93218381 is a wasteful number, since it uses less digits than its factorization.

93218381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734130.

The product of its digits is 10368, while the sum is 35.

The square root of 93218381 is about 9654.9666493469. The cubic root of 93218381 is about 453.4198392563.

The spelling of 93218381 in words is "ninety-three million, two hundred eighteen thousand, three hundred eighty-one".