223640943 has 8 divisors (see below), whose sum is σ = 298265856. Its totient is φ = 149055000.

The previous prime is 223640939. The next prime is 223640947. The reversal of 223640943 is 349046322.

It is an interprime number because it is at equal distance from previous prime (223640939) and next prime (223640947).

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

It is not a de Polignac number, because 223640943 - 2² = 223640939 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223640947) 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, 8568 + ... + 22818.

It is an arithmetic number, because the mean of its divisors is an integer number (37283232).

Almost surely, 2^223640943 is an apocalyptic number.

223640943 is a deficient number, since it is larger than the sum of its proper divisors (74624913).

223640943 is a wasteful number, since it uses less digits than its factorization.

223640943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19485.

The product of its (nonzero) digits is 31104, while the sum is 33.

The square root of 223640943 is about 14954.6294838756. The cubic root of 223640943 is about 606.9931242532.

The spelling of 223640943 in words is "two hundred twenty-three million, six hundred forty thousand, nine hundred forty-three".