23431403 has 4 divisors (see below), whose sum is σ = 23646480. Its totient is φ = 23216328.

The previous prime is 23431399. The next prime is 23431409. The reversal of 23431403 is 30413432.

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 23431403 - 2² = 23431399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23431409) 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, 107375 + ... + 107592.

It is an arithmetic number, because the mean of its divisors is an integer number (5911620).

Almost surely, 2^23431403 is an apocalyptic number.

23431403 is a deficient number, since it is larger than the sum of its proper divisors (215077).

23431403 is a wasteful number, since it uses less digits than its factorization.

23431403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215076.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 23431403 is about 4840.5994463496. The cubic root of 23431403 is about 286.1537431165.

Adding to 23431403 its reverse (30413432), we get a palindrome (53844835).

The spelling of 23431403 in words is "twenty-three million, four hundred thirty-one thousand, four hundred three".