23150921 has 2 divisors, whose sum is σ = 23150922. Its totient is φ = 23150920.

The previous prime is 23150887. The next prime is 23150927. The reversal of 23150921 is 12905132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21160000 + 1990921 = 4600^2 + 1411^2 .

It is a cyclic number.

It is not a de Polignac number, because 23150921 - 2¹⁸ = 22888777 is a prime.

It is a super-3 number, since 3×23150921³ (a number of 23 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (23150927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11575460 + 11575461.

It is an arithmetic number, because the mean of its divisors is an integer number (11575461).

Almost surely, 2^23150921 is an apocalyptic number.

It is an amenable number.

23150921 is a deficient number, since it is larger than the sum of its proper divisors (1).

23150921 is an equidigital number, since it uses as much as digits as its factorization.

23150921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 23150921 is about 4811.5403978352. The cubic root of 23150921 is about 285.0073702824.

The spelling of 23150921 in words is "twenty-three million, one hundred fifty thousand, nine hundred twenty-one".