223958981 has 8 divisors (see below), whose sum is σ = 233879424. Its totient is φ = 214053840.

The previous prime is 223958927. The next prime is 223958989. The reversal of 223958981 is 189859322.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 223958981 - 2²⁶ = 156850117 is a prime.

It is a super-2 number, since 2×223958981² = 100315250341116722, 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 (223958989) 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, 34280 + ... + 40286.

It is an arithmetic number, because the mean of its divisors is an integer number (29234928).

Almost surely, 2^223958981 is an apocalyptic number.

It is an amenable number.

223958981 is a deficient number, since it is larger than the sum of its proper divisors (9920443).

223958981 is a wasteful number, since it uses less digits than its factorization.

223958981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7651.

The product of its digits is 311040, while the sum is 47.

The square root of 223958981 is about 14965.2591357450. The cubic root of 223958981 is about 607.2807213255.

The spelling of 223958981 in words is "two hundred twenty-three million, nine hundred fifty-eight thousand, nine hundred eighty-one".