23151539 has 2 divisors, whose sum is σ = 23151540. Its totient is φ = 23151538.

The previous prime is 23151533. The next prime is 23151559. The reversal of 23151539 is 93515132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23151539 - 2⁸ = 23151283 is a prime.

It is not a weakly prime, because it can be changed into another prime (23151533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11575769 + 11575770.

It is an arithmetic number, because the mean of its divisors is an integer number (11575770).

Almost surely, 2^23151539 is an apocalyptic number.

23151539 is a deficient number, since it is larger than the sum of its proper divisors (1).

23151539 is an equidigital number, since it uses as much as digits as its factorization.

23151539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4050, while the sum is 29.

The square root of 23151539 is about 4811.6046180043. The cubic root of 23151539 is about 285.0099062936.

The spelling of 23151539 in words is "twenty-three million, one hundred fifty-one thousand, five hundred thirty-nine".