856711151 has 2 divisors, whose sum is σ = 856711152. Its totient is φ = 856711150.

The previous prime is 856711147. The next prime is 856711171. The reversal of 856711151 is 151117658.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 856711151 - 2² = 856711147 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856711171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428355575 + 428355576.

It is an arithmetic number, because the mean of its divisors is an integer number (428355576).

Almost surely, 2^856711151 is an apocalyptic number.

856711151 is a deficient number, since it is larger than the sum of its proper divisors (1).

856711151 is an equidigital number, since it uses as much as digits as its factorization.

856711151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 35.

The square root of 856711151 is about 29269.6284738976. The cubic root of 856711151 is about 949.7547477714.

The spelling of 856711151 in words is "eight hundred fifty-six million, seven hundred eleven thousand, one hundred fifty-one".