23015851 has 2 divisors, whose sum is σ = 23015852. Its totient is φ = 23015850.

The previous prime is 23015843. The next prime is 23015899. The reversal of 23015851 is 15851032.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23015851 - 2³ = 23015843 is a prime.

It is not a weakly prime, because it can be changed into another prime (23019851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11507925 + 11507926.

It is an arithmetic number, because the mean of its divisors is an integer number (11507926).

Almost surely, 2^23015851 is an apocalyptic number.

23015851 is the 2146-th centered decagonal number.

23015851 is a deficient number, since it is larger than the sum of its proper divisors (1).

23015851 is an equidigital number, since it uses as much as digits as its factorization.

23015851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 23015851 is about 4797.4838196705. The cubic root of 23015851 is about 284.4520136140.

Adding to 23015851 its reverse (15851032), we get a palindrome (38866883).

The spelling of 23015851 in words is "twenty-three million, fifteen thousand, eight hundred fifty-one".