13023631 has 4 divisors (see below), whose sum is σ = 13118832. Its totient is φ = 12928432.

The previous prime is 13023623. The next prime is 13023641. The reversal of 13023631 is 13632031.

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 13023631 - 2³ = 13023623 is a prime.

It is a super-2 number, since 2×13023631² = 339229928848322, 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 = 13023599 and 13023608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13023611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47395 + ... + 47668.

It is an arithmetic number, because the mean of its divisors is an integer number (3279708).

Almost surely, 2^13023631 is an apocalyptic number.

13023631 is a deficient number, since it is larger than the sum of its proper divisors (95201).

13023631 is an equidigital number, since it uses as much as digits as its factorization.

13023631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95200.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 13023631 is about 3608.8268176791. The cubic root of 13023631 is about 235.2758553265.

Adding to 13023631 its reverse (13632031), we get a palindrome (26655662).

Subtracting 13023631 from its reverse (13632031), we obtain a square (608400 = 780²).

The spelling of 13023631 in words is "thirteen million, twenty-three thousand, six hundred thirty-one".