223497021 has 16 divisors (see below), whose sum is σ = 328442688. Its totient is φ = 134054400.

The previous prime is 223497007. The next prime is 223497031. The reversal of 223497021 is 120794322.

It is not a de Polignac number, because 223497021 - 2¹⁵ = 223464253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 223497021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (223497031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31710 + ... + 38111.

It is an arithmetic number, because the mean of its divisors is an integer number (20527668).

Almost surely, 2^223497021 is an apocalyptic number.

It is an amenable number.

223497021 is a deficient number, since it is larger than the sum of its proper divisors (104945667).

223497021 is a wasteful number, since it uses less digits than its factorization.

223497021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69932.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 223497021 is about 14949.8167547298. The cubic root of 223497021 is about 606.8628880961.

The spelling of 223497021 in words is "two hundred twenty-three million, four hundred ninety-seven thousand, twenty-one".