13020231 has 24 divisors (see below), whose sum is σ = 21078144. Its totient is φ = 7114800.

The previous prime is 13020229. The next prime is 13020233. The reversal of 13020231 is 13202031.

It is a happy number.

13020231 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13020229) and next prime (13020233).

It is not a de Polignac number, because 13020231 - 2¹ = 13020229 is a prime.

It is a super-2 number, since 2×13020231² = 339052830586722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13020233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1456 + ... + 5306.

It is an arithmetic number, because the mean of its divisors is an integer number (878256).

Almost surely, 2^13020231 is an apocalyptic number.

13020231 is a deficient number, since it is larger than the sum of its proper divisors (8057913).

13020231 is a wasteful number, since it uses less digits than its factorization.

13020231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3891 (or 3884 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 13020231 is about 3608.3557197150. The cubic root of 13020231 is about 235.2553795332.

Adding to 13020231 its reverse (13202031), we get a palindrome (26222262).

The spelling of 13020231 in words is "thirteen million, twenty thousand, two hundred thirty-one".