857226333881 has 2 divisors, whose sum is σ = 857226333882. Its totient is φ = 857226333880.

The previous prime is 857226333839. The next prime is 857226333893. The reversal of 857226333881 is 188333622758.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 767621299600 + 89605034281 = 876140^2 + 299341^2 .

It is a cyclic number.

It is not a de Polignac number, because 857226333881 - 2²² = 857222139577 is a prime.

It is a super-2 number, since 2×857226333881² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (857226333181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428613166940 + 428613166941.

It is an arithmetic number, because the mean of its divisors is an integer number (428613166941).

Almost surely, 2^857226333881 is an apocalyptic number.

It is an amenable number.

857226333881 is a deficient number, since it is larger than the sum of its proper divisors (1).

857226333881 is an equidigital number, since it uses as much as digits as its factorization.

857226333881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11612160, while the sum is 56.

The spelling of 857226333881 in words is "eight hundred fifty-seven billion, two hundred twenty-six million, three hundred thirty-three thousand, eight hundred eighty-one".