23415451 has 4 divisors (see below), whose sum is σ = 23564752. Its totient is φ = 23266152.

The previous prime is 23415421. The next prime is 23415473. The reversal of 23415451 is 15451432.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 23415451 - 2⁹ = 23414939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23415401) by changing a digit.

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, 74415 + ... + 74728.

It is an arithmetic number, because the mean of its divisors is an integer number (5891188).

Almost surely, 2^23415451 is an apocalyptic number.

23415451 is a deficient number, since it is larger than the sum of its proper divisors (149301).

23415451 is a wasteful number, since it uses less digits than its factorization.

23415451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149300.

The product of its digits is 2400, while the sum is 25.

The square root of 23415451 is about 4838.9514360035. The cubic root of 23415451 is about 286.0887909554.

Adding to 23415451 its reverse (15451432), we get a palindrome (38866883).

The spelling of 23415451 in words is "twenty-three million, four hundred fifteen thousand, four hundred fifty-one".