23003531 has 2 divisors, whose sum is σ = 23003532. Its totient is φ = 23003530.

The previous prime is 23003459. The next prime is 23003549. The reversal of 23003531 is 13530032.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 23003531 - 2²² = 18809227 is a prime.

It is a super-2 number, since 2×23003531² = 1058324876935922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23003551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11501765 + 11501766.

It is an arithmetic number, because the mean of its divisors is an integer number (11501766).

Almost surely, 2^23003531 is an apocalyptic number.

23003531 is a deficient number, since it is larger than the sum of its proper divisors (1).

23003531 is an equidigital number, since it uses as much as digits as its factorization.

23003531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 270, while the sum is 17.

The square root of 23003531 is about 4796.1996413827. The cubic root of 23003531 is about 284.4012504206.

Adding to 23003531 its reverse (13530032), we get a palindrome (36533563).

The spelling of 23003531 in words is "twenty-three million, three thousand, five hundred thirty-one".