23150021 has 2 divisors, whose sum is σ = 23150022. Its totient is φ = 23150020.

The previous prime is 23150009. The next prime is 23150027. The reversal of 23150021 is 12005132.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16924996 + 6225025 = 4114^2 + 2495^2 .

It is a cyclic number.

It is not a de Polignac number, because 23150021 - 2⁶ = 23149957 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23149978 and 23150005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23150027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11575010 + 11575011.

It is an arithmetic number, because the mean of its divisors is an integer number (11575011).

Almost surely, 2^23150021 is an apocalyptic number.

It is an amenable number.

23150021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23150021 is an equidigital number, since it uses as much as digits as its factorization.

23150021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 23150021 is about 4811.4468717840. The cubic root of 23150021 is about 285.0036769814.

Adding to 23150021 its reverse (12005132), we get a palindrome (35155153).

The spelling of 23150021 in words is "twenty-three million, one hundred fifty thousand, twenty-one".