862538657231 has 2 divisors, whose sum is σ = 862538657232. Its totient is φ = 862538657230.

The previous prime is 862538657221. The next prime is 862538657257. The reversal of 862538657231 is 132756835268.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 862538657231 - 2¹⁸ = 862538395087 is a prime.

It is a super-2 number, since 2×862538657231² (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 (862538657221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431269328615 + 431269328616.

It is an arithmetic number, because the mean of its divisors is an integer number (431269328616).

Almost surely, 2^862538657231 is an apocalyptic number.

862538657231 is a deficient number, since it is larger than the sum of its proper divisors (1).

862538657231 is an equidigital number, since it uses as much as digits as its factorization.

862538657231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14515200, while the sum is 56.

The spelling of 862538657231 in words is "eight hundred sixty-two billion, five hundred thirty-eight million, six hundred fifty-seven thousand, two hundred thirty-one".