23401505 has 4 divisors (see below), whose sum is σ = 28081812. Its totient is φ = 18721200.

The previous prime is 23401487. The next prime is 23401513. The reversal of 23401505 is 50510432.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4669921 + 18731584 = 2161^2 + 4328^2 .

It is not a de Polignac number, because 23401505 - 2²⁰ = 22352929 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2340146 + ... + 2340155.

It is an arithmetic number, because the mean of its divisors is an integer number (7020453).

Almost surely, 2^23401505 is an apocalyptic number.

It is an amenable number.

23401505 is a deficient number, since it is larger than the sum of its proper divisors (4680307).

23401505 is an equidigital number, since it uses as much as digits as its factorization.

23401505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4680306.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 23401505 is about 4837.5102067076. The cubic root of 23401505 is about 286.0319825026.

Adding to 23401505 its reverse (50510432), we get a palindrome (73911937).

The spelling of 23401505 in words is "twenty-three million, four hundred one thousand, five hundred five".