23021147 has 2 divisors, whose sum is σ = 23021148. Its totient is φ = 23021146.

The previous prime is 23021101. The next prime is 23021149. The reversal of 23021147 is 74112032.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23021147 - 2⁶ = 23021083 is a prime.

Together with 23021149, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (23021149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11510573 + 11510574.

It is an arithmetic number, because the mean of its divisors is an integer number (11510574).

Almost surely, 2^23021147 is an apocalyptic number.

23021147 is a deficient number, since it is larger than the sum of its proper divisors (1).

23021147 is an equidigital number, since it uses as much as digits as its factorization.

23021147 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 23021147 is about 4798.0357439269. The cubic root of 23021147 is about 284.4738296273.

Adding to 23021147 its reverse (74112032), we get a palindrome (97133179).

The spelling of 23021147 in words is "twenty-three million, twenty-one thousand, one hundred forty-seven".