23213857 has 8 divisors (see below), whose sum is σ = 24645600. Its totient is φ = 21789504.

The previous prime is 23213849. The next prime is 23213867. The reversal of 23213857 is 75831232.

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

It is a cyclic number.

It is not a de Polignac number, because 23213857 - 2³ = 23213849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23213807) 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 7 ways as a sum of consecutive naturals, for example, 5494 + ... + 8752.

It is an arithmetic number, because the mean of its divisors is an integer number (3080700).

Almost surely, 2^23213857 is an apocalyptic number.

It is an amenable number.

23213857 is a deficient number, since it is larger than the sum of its proper divisors (1431743).

23213857 is a wasteful number, since it uses less digits than its factorization.

23213857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3695.

The product of its digits is 10080, while the sum is 31.

The square root of 23213857 is about 4818.0760683078. The cubic root of 23213857 is about 285.2654016898.

The spelling of 23213857 in words is "twenty-three million, two hundred thirteen thousand, eight hundred fifty-seven".