1361308311 has 24 divisors (see below), whose sum is σ = 2169208080. Its totient is φ = 815760000.

The previous prime is 1361308297. The next prime is 1361308313. The reversal of 1361308311 is 1138031631.

1361308311 is a `hidden beast` number, since 13 + 613 + 0 + 8 + 31 + 1 = 666.

It is not a de Polignac number, because 1361308311 - 2¹⁴ = 1361291927 is a prime.

It is a super-3 number, since 3×1361308311³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361308313) 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, 68440 + ... + 86061.

It is an arithmetic number, because the mean of its divisors is an integer number (90383670).

Almost surely, 2^1361308311 is an apocalyptic number.

1361308311 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1361308311 is a deficient number, since it is larger than the sum of its proper divisors (807899769).

1361308311 is a wasteful number, since it uses less digits than its factorization.

1361308311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154607 (or 154604 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1361308311 is about 36895.9118467074. The cubic root of 1361308311 is about 1108.2868117935.

Adding to 1361308311 its reverse (1138031631), we get a palindrome (2499339942).

It can be divided in two parts, 136130 and 8311, that added together give a palindrome (144441).

The spelling of 1361308311 in words is "one billion, three hundred sixty-one million, three hundred eight thousand, three hundred eleven".