13091481 has 12 divisors (see below), whose sum is σ = 20364708. Its totient is φ = 8056224.

The previous prime is 13091473. The next prime is 13091497. The reversal of 13091481 is 18419031.

13091481 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 can be written as a sum of positive squares in 2 ways, for example, as 4447881 + 8643600 = 2109^2 + 2940^2 .

It is not a de Polignac number, because 13091481 - 2³ = 13091473 is a prime.

It is a super-2 number, since 2×13091481² = 342773749546722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13091431) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55830 + ... + 56063.

It is an arithmetic number, because the mean of its divisors is an integer number (1697059).

Almost surely, 2^13091481 is an apocalyptic number.

It is an amenable number.

13091481 is a deficient number, since it is larger than the sum of its proper divisors (7273227).

13091481 is a wasteful number, since it uses less digits than its factorization.

13091481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111912 (or 111909 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 13091481 is about 3618.2151677312. The cubic root of 13091481 is about 235.6837248061.

The spelling of 13091481 in words is "thirteen million, ninety-one thousand, four hundred eighty-one".