113851281 has 4 divisors (see below), whose sum is σ = 151801712. Its totient is φ = 75900852.

The previous prime is 113851277. The next prime is 113851289. The reversal of 113851281 is 182158311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 113851281 - 2² = 113851277 is a prime.

It is a super-2 number, since 2×113851281² = 25924228370681922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113851289) 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, 18975211 + ... + 18975216.

It is an arithmetic number, because the mean of its divisors is an integer number (37950428).

Almost surely, 2^113851281 is an apocalyptic number.

It is an amenable number.

113851281 is a deficient number, since it is larger than the sum of its proper divisors (37950431).

113851281 is an equidigital number, since it uses as much as digits as its factorization.

113851281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37950430.

The product of its digits is 1920, while the sum is 30.

The square root of 113851281 is about 10670.1115739246. Note that the first 3 decimals coincide. The cubic root of 113851281 is about 484.6698160056.

The spelling of 113851281 in words is "one hundred thirteen million, eight hundred fifty-one thousand, two hundred eighty-one".