23457221 has 4 divisors (see below), whose sum is σ = 23480352. Its totient is φ = 23434092.

The previous prime is 23457209. The next prime is 23457227. The reversal of 23457221 is 12275432.

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 23457221 - 2¹⁰ = 23456197 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 (23457227) 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, 9971 + ... + 12096.

It is an arithmetic number, because the mean of its divisors is an integer number (5870088).

Almost surely, 2^23457221 is an apocalyptic number.

It is an amenable number.

23457221 is a deficient number, since it is larger than the sum of its proper divisors (23131).

23457221 is a wasteful number, since it uses less digits than its factorization.

23457221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23130.

The product of its digits is 3360, while the sum is 26.

The square root of 23457221 is about 4843.2655306105. The cubic root of 23457221 is about 286.2588044812.

The spelling of 23457221 in words is "twenty-three million, four hundred fifty-seven thousand, two hundred twenty-one".