23151663 has 10 divisors (see below), whose sum is σ = 34584704. Its totient is φ = 15434388.

The previous prime is 23151647. The next prime is 23151679. The reversal of 23151663 is 36615132.

It is an interprime number because it is at equal distance from previous prime (23151647) and next prime (23151679).

It is not a de Polignac number, because 23151663 - 2⁴ = 23151647 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23151643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 142831 + ... + 142992.

Almost surely, 2^23151663 is an apocalyptic number.

23151663 is a deficient number, since it is larger than the sum of its proper divisors (11433041).

23151663 is an equidigital number, since it uses as much as digits as its factorization.

23151663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285835 (or 285826 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 23151663 is about 4811.6175035013. The cubic root of 23151663 is about 285.0104151318.

Adding to 23151663 its reverse (36615132), we get a palindrome (59766795).

The spelling of 23151663 in words is "twenty-three million, one hundred fifty-one thousand, six hundred sixty-three".