817273800231 has 32 divisors (see below), whose sum is σ = 1267023513600. Its totient is φ = 458900208480.

The previous prime is 817273800209. The next prime is 817273800269. The reversal of 817273800231 is 132008372718.

It is not a de Polignac number, because 817273800231 - 2¹³ = 817273792039 is a prime.

It is a super-2 number, since 2×817273800231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (817273800271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2757016 + ... + 3039026.

It is an arithmetic number, because the mean of its divisors is an integer number (39594484800).

Almost surely, 2^817273800231 is an apocalyptic number.

817273800231 is a deficient number, since it is larger than the sum of its proper divisors (449749713369).

817273800231 is a wasteful number, since it uses less digits than its factorization.

817273800231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284419.

The product of its (nonzero) digits is 112896, while the sum is 42.

The spelling of 817273800231 in words is "eight hundred seventeen billion, two hundred seventy-three million, eight hundred thousand, two hundred thirty-one".