23521043 has 16 divisors (see below), whose sum is σ = 29627136. Its totient is φ = 18174240.

The previous prime is 23521039. The next prime is 23521049. The reversal of 23521043 is 34012532.

It is a happy number.

It is not a de Polignac number, because 23521043 - 2² = 23521039 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23521049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 908 + ... + 6918.

It is an arithmetic number, because the mean of its divisors is an integer number (1851696).

Almost surely, 2^23521043 is an apocalyptic number.

23521043 is a deficient number, since it is larger than the sum of its proper divisors (6106093).

23521043 is a wasteful number, since it uses less digits than its factorization.

23521043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6074.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 23521043 is about 4849.8497914884. The cubic root of 23521043 is about 286.5181853801.

Adding to 23521043 its reverse (34012532), we get a palindrome (57533575).

The spelling of 23521043 in words is "twenty-three million, five hundred twenty-one thousand, forty-three".