23021503 has 2 divisors, whose sum is σ = 23021504. Its totient is φ = 23021502.

The previous prime is 23021501. The next prime is 23021507. The reversal of 23021503 is 30512032.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 23021503 - 2¹ = 23021501 is a prime.

Together with 23021501, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23021501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11510751 + 11510752.

It is an arithmetic number, because the mean of its divisors is an integer number (11510752).

Almost surely, 2^23021503 is an apocalyptic number.

23021503 is a deficient number, since it is larger than the sum of its proper divisors (1).

23021503 is an equidigital number, since it uses as much as digits as its factorization.

23021503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 23021503 is about 4798.0728422982. The cubic root of 23021503 is about 284.4752959915.

Adding to 23021503 its reverse (30512032), we get a palindrome (53533535).

The spelling of 23021503 in words is "twenty-three million, twenty-one thousand, five hundred three".