23432531 has 4 divisors (see below), whose sum is σ = 23450112. Its totient is φ = 23414952.

The previous prime is 23432527. The next prime is 23432537. The reversal of 23432531 is 13523432.

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 23432531 - 2² = 23432527 is a prime.

It is a super-3 number, since 3×23432531³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23432497 and 23432506.

It is not an unprimeable number, because it can be changed into a prime (23432537) 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, 6611 + ... + 9516.

It is an arithmetic number, because the mean of its divisors is an integer number (5862528).

Almost surely, 2^23432531 is an apocalyptic number.

23432531 is a deficient number, since it is larger than the sum of its proper divisors (17581).

23432531 is a wasteful number, since it uses less digits than its factorization.

23432531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17580.

The product of its digits is 2160, while the sum is 23.

The square root of 23432531 is about 4840.7159594424. The cubic root of 23432531 is about 286.1583349064.

Adding to 23432531 its reverse (13523432), we get a palindrome (36955963).

Subtracting from 23432531 its reverse (13523432), we obtain a palindrome (9909099).

The spelling of 23432531 in words is "twenty-three million, four hundred thirty-two thousand, five hundred thirty-one".