1312555333 has 2 divisors, whose sum is σ = 1312555334. Its totient is φ = 1312555332.

The previous prime is 1312555303. The next prime is 1312555339. The reversal of 1312555333 is 3335552131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 969824164 + 342731169 = 31142^2 + 18513^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312555333 - 2²⁹ = 775684421 is a prime.

It is a super-3 number, since 3×1312555333³ (a number of 28 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1312555295 and 1312555304.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312555339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656277666 + 656277667.

It is an arithmetic number, because the mean of its divisors is an integer number (656277667).

Almost surely, 2^1312555333 is an apocalyptic number.

It is an amenable number.

1312555333 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312555333 is an equidigital number, since it uses as much as digits as its factorization.

1312555333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20250, while the sum is 31.

The square root of 1312555333 is about 36229.2055253769. The cubic root of 1312555333 is about 1094.8951709102.

The spelling of 1312555333 in words is "one billion, three hundred twelve million, five hundred fifty-five thousand, three hundred thirty-three".