23211427 has 2 divisors, whose sum is σ = 23211428. Its totient is φ = 23211426.

The previous prime is 23211389. The next prime is 23211437. The reversal of 23211427 is 72411232.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23211427 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 23211398 and 23211407.

It is not a weakly prime, because it can be changed into another prime (23211437) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11605713 + 11605714.

It is an arithmetic number, because the mean of its divisors is an integer number (11605714).

Almost surely, 2^23211427 is an apocalyptic number.

23211427 is a deficient number, since it is larger than the sum of its proper divisors (1).

23211427 is an equidigital number, since it uses as much as digits as its factorization.

23211427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 672, while the sum is 22.

The square root of 23211427 is about 4817.8238863620. The cubic root of 23211427 is about 285.2554475905.

Adding to 23211427 its reverse (72411232), we get a palindrome (95622659).

The spelling of 23211427 in words is "twenty-three million, two hundred eleven thousand, four hundred twenty-seven".