23381503 has 4 divisors (see below), whose sum is σ = 23521680. Its totient is φ = 23241328.

The previous prime is 23381497. The next prime is 23381537. The reversal of 23381503 is 30518332.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23381503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23381563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69838 + ... + 70171.

It is an arithmetic number, because the mean of its divisors is an integer number (5880420).

Almost surely, 2^23381503 is an apocalyptic number.

23381503 is a deficient number, since it is larger than the sum of its proper divisors (140177).

23381503 is a wasteful number, since it uses less digits than its factorization.

23381503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140176.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 23381503 is about 4835.4423789349. The cubic root of 23381503 is about 285.9504657722.

Adding to 23381503 its reverse (30518332), we get a palindrome (53899835).

The spelling of 23381503 in words is "twenty-three million, three hundred eighty-one thousand, five hundred three".