23251405 has 4 divisors (see below), whose sum is σ = 27901692. Its totient is φ = 18601120.

The previous prime is 23251399. The next prime is 23251411. The reversal of 23251405 is 50415232.

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

It is an interprime number because it is at equal distance from previous prime (23251399) and next prime (23251411).

It can be written as a sum of positive squares in 2 ways, for example, as 9753129 + 13498276 = 3123^2 + 3674^2 .

It is not a de Polignac number, because 23251405 - 2⁹ = 23250893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2325136 + ... + 2325145.

It is an arithmetic number, because the mean of its divisors is an integer number (6975423).

Almost surely, 2^23251405 is an apocalyptic number.

It is an amenable number.

23251405 is a deficient number, since it is larger than the sum of its proper divisors (4650287).

23251405 is an equidigital number, since it uses as much as digits as its factorization.

23251405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4650286.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 23251405 is about 4821.9710700086. The cubic root of 23251405 is about 285.4191227404.

Adding to 23251405 its reverse (50415232), we get a palindrome (73666637).

The spelling of 23251405 in words is "twenty-three million, two hundred fifty-one thousand, four hundred five".