231478262136 has 128 divisors (see below), whose sum is σ = 710328960000. Its totient is φ = 69256961280.

The previous prime is 231478262051. The next prime is 231478262179. The reversal of 231478262136 is 631262874132.

231478262136 is a `hidden beast` number, since 2 + 3 + 14 + 7 + 8 + 2 + 621 + 3 + 6 = 666.

It is a super-3 number, since 3×231478262136³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 231478262091 and 231478262100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 428901 + ... + 804308.

It is an arithmetic number, because the mean of its divisors is an integer number (5549445000).

Almost surely, 2^231478262136 is an apocalyptic number.

It is an amenable number.

231478262136 is an abundant number, since it is smaller than the sum of its proper divisors (478850697864).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231478262136 is a wasteful number, since it uses less digits than its factorization.

231478262136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1233314 (or 1233304 counting only the distinct ones).

The product of its digits is 580608, while the sum is 45.

The spelling of 231478262136 in words is "two hundred thirty-one billion, four hundred seventy-eight million, two hundred sixty-two thousand, one hundred thirty-six".