1316322261 has 24 divisors (see below), whose sum is σ = 2050251840. Its totient is φ = 811080000.

The previous prime is 1316322221. The next prime is 1316322263. The reversal of 1316322261 is 1622236131.

1316322261 is a `hidden beast` number, since 1 + 3 + 1 + 632 + 2 + 26 + 1 = 666.

It is not a de Polignac number, because 1316322261 - 2²¹ = 1314225109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316322263) 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, 86865 + ... + 100886.

It is an arithmetic number, because the mean of its divisors is an integer number (85427160).

Almost surely, 2^1316322261 is an apocalyptic number.

It is an amenable number.

1316322261 is a deficient number, since it is larger than the sum of its proper divisors (733929579).

1316322261 is a wasteful number, since it uses less digits than its factorization.

1316322261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187817 (or 187814 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 1316322261 is about 36281.1557285597. The cubic root of 1316322261 is about 1095.9415907943.

Adding to 1316322261 its reverse (1622236131), we get a palindrome (2938558392).

The spelling of 1316322261 in words is "one billion, three hundred sixteen million, three hundred twenty-two thousand, two hundred sixty-one".