136171870231 has 4 divisors (see below), whose sum is σ = 142092386352. Its totient is φ = 130251354112.

The previous prime is 136171870097. The next prime is 136171870253. The reversal of 136171870231 is 132078171631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 132078171631 = 7 ⋅18868310233.

It is a cyclic number.

It is not a de Polignac number, because 136171870231 - 2⁹ = 136171869719 is a prime.

It is a super-2 number, since 2×136171870231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136171870271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2960258026 + ... + 2960258071.

It is an arithmetic number, because the mean of its divisors is an integer number (35523096588).

Almost surely, 2^136171870231 is an apocalyptic number.

136171870231 is a deficient number, since it is larger than the sum of its proper divisors (5920516121).

136171870231 is an equidigital number, since it uses as much as digits as its factorization.

136171870231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5920516120.

The product of its (nonzero) digits is 42336, while the sum is 40.

The spelling of 136171870231 in words is "one hundred thirty-six billion, one hundred seventy-one million, eight hundred seventy thousand, two hundred thirty-one".