13776231 has 16 divisors (see below), whose sum is σ = 21211904. Its totient is φ = 7789824.

The previous prime is 13776229. The next prime is 13776251. The reversal of 13776231 is 13267731.

It is not a de Polignac number, because 13776231 - 2¹ = 13776229 is a prime.

It is a super-2 number, since 2×13776231² = 379569081130722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13776251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1345 + ... + 5418.

It is an arithmetic number, because the mean of its divisors is an integer number (1325744).

Almost surely, 2^13776231 is an apocalyptic number.

13776231 is a deficient number, since it is larger than the sum of its proper divisors (7435673).

13776231 is an equidigital number, since it uses as much as digits as its factorization.

13776231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6870.

The product of its digits is 5292, while the sum is 30.

The square root of 13776231 is about 3711.6345455877. The cubic root of 13776231 is about 239.7232400000.

The spelling of 13776231 in words is "thirteen million, seven hundred seventy-six thousand, two hundred thirty-one".