856252351 has 2 divisors, whose sum is σ = 856252352. Its totient is φ = 856252350.

The previous prime is 856252301. The next prime is 856252363. The reversal of 856252351 is 153252658.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 856252351 - 2²¹ = 854155199 is a prime.

It is a super-3 number, since 3×856252351³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 856252351.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856252301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428126175 + 428126176.

It is an arithmetic number, because the mean of its divisors is an integer number (428126176).

Almost surely, 2^856252351 is an apocalyptic number.

856252351 is a deficient number, since it is larger than the sum of its proper divisors (1).

856252351 is an equidigital number, since it uses as much as digits as its factorization.

856252351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72000, while the sum is 37.

The square root of 856252351 is about 29261.7899486686. The cubic root of 856252351 is about 949.5851747529.

The spelling of 856252351 in words is "eight hundred fifty-six million, two hundred fifty-two thousand, three hundred fifty-one".