23219857 has 4 divisors (see below), whose sum is σ = 24229440. Its totient is φ = 22210276.

The previous prime is 23219851. The next prime is 23219869. The reversal of 23219857 is 75891232.

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 23219857 - 2¹⁵ = 23187089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23219851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 504757 + ... + 504802.

It is an arithmetic number, because the mean of its divisors is an integer number (6057360).

Almost surely, 2^23219857 is an apocalyptic number.

It is an amenable number.

23219857 is a deficient number, since it is larger than the sum of its proper divisors (1009583).

23219857 is a wasteful number, since it uses less digits than its factorization.

23219857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1009582.

The product of its digits is 30240, while the sum is 37.

The square root of 23219857 is about 4818.6986832546. The cubic root of 23219857 is about 285.2899767381.

The spelling of 23219857 in words is "twenty-three million, two hundred nineteen thousand, eight hundred fifty-seven".