23681501 has 2 divisors, whose sum is σ = 23681502. Its totient is φ = 23681500.

The previous prime is 23681491. The next prime is 23681507. The reversal of 23681501 is 10518632.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20259001 + 3422500 = 4501^2 + 1850^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23681501 is a prime.

It is a super-2 number, since 2×23681501² = 1121626979226002, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23681507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11840750 + 11840751.

It is an arithmetic number, because the mean of its divisors is an integer number (11840751).

Almost surely, 2^23681501 is an apocalyptic number.

It is an amenable number.

23681501 is a deficient number, since it is larger than the sum of its proper divisors (1).

23681501 is an equidigital number, since it uses as much as digits as its factorization.

23681501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 23681501 is about 4866.3642485946. The cubic root of 23681501 is about 287.1682413873.

The spelling of 23681501 in words is "twenty-three million, six hundred eighty-one thousand, five hundred one".