23198621 has 8 divisors (see below), whose sum is σ = 23485944. Its totient is φ = 22913280.

The previous prime is 23198603. The next prime is 23198641. The reversal of 23198621 is 12689132.

It can be written as a sum of positive squares in 4 ways, for example, as 24025 + 23174596 = 155^2 + 4814^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23198621 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 (23198641) 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, 42611 + ... + 43151.

It is an arithmetic number, because the mean of its divisors is an integer number (2935743).

Almost surely, 2^23198621 is an apocalyptic number.

It is an amenable number.

23198621 is a deficient number, since it is larger than the sum of its proper divisors (287323).

23198621 is a wasteful number, since it uses less digits than its factorization.

23198621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991.

The product of its digits is 5184, while the sum is 32.

The square root of 23198621 is about 4816.4946797438. The cubic root of 23198621 is about 285.2029784157.

The spelling of 23198621 in words is "twenty-three million, one hundred ninety-eight thousand, six hundred twenty-one".