231110136206442 has 24 divisors (see below), whose sum is σ = 500929969255716. Its totient is φ = 77007275021376.

The previous prime is 231110136206393. The next prime is 231110136206471. The reversal of 231110136206442 is 244602631011132.

231110136206442 is a `hidden beast` number, since 2 + 3 + 1 + 1 + 1 + 0 + 1 + 3 + 6 + 2 + 0 + 644 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 138735912661641 + 92374223544801 = 11778621^2 + 9611151^2 .

It is a junction number, because it is equal to n+sod(n) for n = 231110136206397 and 231110136206406.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2453038873 + ... + 2453133084.

Almost surely, 2^{231110136206442} is an apocalyptic number.

231110136206442 is an abundant number, since it is smaller than the sum of its proper divisors (269819833049274).

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

231110136206442 is a wasteful number, since it uses less digits than its factorization.

231110136206442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4906174582 (or 4906174579 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

Adding to 231110136206442 its reverse (244602631011132), we get a palindrome (475712767217574).

The spelling of 231110136206442 in words is "two hundred thirty-one trillion, one hundred ten billion, one hundred thirty-six million, two hundred six thousand, four hundred forty-two".