113171831 has 4 divisors (see below), whose sum is σ = 113679552. Its totient is φ = 112664112.

The previous prime is 113171791. The next prime is 113171837. The reversal of 113171831 is 138171311.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 113171831 - 2¹⁰ = 113170807 is a prime.

It is a super-2 number, since 2×113171831² = 25615726663785122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 113171831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113171837) 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, 253526 + ... + 253971.

It is an arithmetic number, because the mean of its divisors is an integer number (28419888).

Almost surely, 2^113171831 is an apocalyptic number.

113171831 is a deficient number, since it is larger than the sum of its proper divisors (507721).

113171831 is an equidigital number, since it uses as much as digits as its factorization.

113171831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507720.

The product of its digits is 504, while the sum is 26.

The square root of 113171831 is about 10638.2249929206. The cubic root of 113171831 is about 483.7037423246.

The spelling of 113171831 in words is "one hundred thirteen million, one hundred seventy-one thousand, eight hundred thirty-one".