23155147 has 2 divisors, whose sum is σ = 23155148. Its totient is φ = 23155146.

The previous prime is 23155127. The next prime is 23155151. The reversal of 23155147 is 74155132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23155147 - 2⁷ = 23155019 is a prime.

It is not a weakly prime, because it can be changed into another prime (23155127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11577573 + 11577574.

It is an arithmetic number, because the mean of its divisors is an integer number (11577574).

Almost surely, 2^23155147 is an apocalyptic number.

23155147 is a deficient number, since it is larger than the sum of its proper divisors (1).

23155147 is an equidigital number, since it uses as much as digits as its factorization.

23155147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4200, while the sum is 28.

The square root of 23155147 is about 4811.9795302973. The cubic root of 23155147 is about 285.0247111024.

The spelling of 23155147 in words is "twenty-three million, one hundred fifty-five thousand, one hundred forty-seven".