13231481 has 2 divisors, whose sum is σ = 13231482. Its totient is φ = 13231480.

The previous prime is 13231411. The next prime is 13231523. The reversal of 13231481 is 18413231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13075456 + 156025 = 3616^2 + 395^2 .

It is a cyclic number.

It is not a de Polignac number, because 13231481 - 2¹⁰ = 13230457 is a prime.

It is a super-2 number, since 2×13231481² = 350144178906722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13231411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6615740 + 6615741.

It is an arithmetic number, because the mean of its divisors is an integer number (6615741).

Almost surely, 2^13231481 is an apocalyptic number.

It is an amenable number.

13231481 is a deficient number, since it is larger than the sum of its proper divisors (1).

13231481 is an equidigital number, since it uses as much as digits as its factorization.

13231481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

The square root of 13231481 is about 3637.5102748996. The cubic root of 13231481 is about 236.5208798184.

It can be divided in two parts, 132 and 31481, that added together give a palindrome (31613).

The spelling of 13231481 in words is "thirteen million, two hundred thirty-one thousand, four hundred eighty-one".