1366320231 has 28 divisors (see below), whose sum is σ = 2087254008. Its totient is φ = 893668464.

The previous prime is 1366320167. The next prime is 1366320251. The reversal of 1366320231 is 1320236631.

It is a happy number.

1366320231 is a `hidden beast` number, since 1 + 3 + 6 + 632 + 0 + 23 + 1 = 666.

It is not a de Polignac number, because 1366320231 - 2⁶ = 1366320167 is a prime.

It is a super-2 number, since 2×1366320231² = 3733661947279786722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1366320195 and 1366320204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1366320251) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 20956 + ... + 56318.

It is an arithmetic number, because the mean of its divisors is an integer number (74544786).

Almost surely, 2^1366320231 is an apocalyptic number.

1366320231 is a deficient number, since it is larger than the sum of its proper divisors (720933777).

1366320231 is an frugal number, since it uses more digits than its factorization.

1366320231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35434 (or 35419 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 1366320231 is about 36963.7691665772. The cubic root of 1366320231 is about 1109.6452701404.

Adding to 1366320231 its reverse (1320236631), we get a palindrome (2686556862).

The spelling of 1366320231 in words is "one billion, three hundred sixty-six million, three hundred twenty thousand, two hundred thirty-one".