856597145431 has 2 divisors, whose sum is σ = 856597145432. Its totient is φ = 856597145430.

The previous prime is 856597145419. The next prime is 856597145483. The reversal of 856597145431 is 134541795658.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 856597145431 - 2¹¹ = 856597143383 is a prime.

It is a super-2 number, since 2×856597145431² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (856597145231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428298572715 + 428298572716.

It is an arithmetic number, because the mean of its divisors is an integer number (428298572716).

Almost surely, 2^856597145431 is an apocalyptic number.

856597145431 is a deficient number, since it is larger than the sum of its proper divisors (1).

856597145431 is an equidigital number, since it uses as much as digits as its factorization.

856597145431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144000, while the sum is 58.

The spelling of 856597145431 in words is "eight hundred fifty-six billion, five hundred ninety-seven million, one hundred forty-five thousand, four hundred thirty-one".