23071631 has 4 divisors (see below), whose sum is σ = 25169064. Its totient is φ = 20974200.

The previous prime is 23071627. The next prime is 23071639. The reversal of 23071631 is 13617032.

It is a happy number.

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 23071631 - 2² = 23071627 is a prime.

It is a super-2 number, since 2×23071631² = 1064600314000322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23071597 and 23071606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23071639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1048700 + ... + 1048721.

It is an arithmetic number, because the mean of its divisors is an integer number (6292266).

Almost surely, 2^23071631 is an apocalyptic number.

23071631 is a deficient number, since it is larger than the sum of its proper divisors (2097433).

23071631 is a wasteful number, since it uses less digits than its factorization.

23071631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2097432.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 23071631 is about 4803.2937657403. The cubic root of 23071631 is about 284.6816225130.

Adding to 23071631 its reverse (13617032), we get a palindrome (36688663).

The spelling of 23071631 in words is "twenty-three million, seventy-one thousand, six hundred thirty-one".