855181313 has 4 divisors (see below), whose sum is σ = 977350080. Its totient is φ = 733012548.

The previous prime is 855181303. The next prime is 855181337. The reversal of 855181313 is 313181558.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 855181313 - 2²⁴ = 838404097 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (855181303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61084373 + ... + 61084386.

It is an arithmetic number, because the mean of its divisors is an integer number (244337520).

Almost surely, 2^855181313 is an apocalyptic number.

It is an amenable number.

855181313 is a deficient number, since it is larger than the sum of its proper divisors (122168767).

855181313 is a wasteful number, since it uses less digits than its factorization.

855181313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122168766.

The product of its digits is 14400, while the sum is 35.

The square root of 855181313 is about 29243.4832569583. The cubic root of 855181313 is about 949.1890819602.

The spelling of 855181313 in words is "eight hundred fifty-five million, one hundred eighty-one thousand, three hundred thirteen".