113151581 has 4 divisors (see below), whose sum is σ = 116801664. Its totient is φ = 109501500.

The previous prime is 113151547. The next prime is 113151583. The reversal of 113151581 is 185151311.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113151581 is a prime.

It is a super-2 number, since 2×113151581² = 25606560565599122, 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 113151581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113151583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1824995 + ... + 1825056.

It is an arithmetic number, because the mean of its divisors is an integer number (29200416).

Almost surely, 2^113151581 is an apocalyptic number.

It is an amenable number.

113151581 is a deficient number, since it is larger than the sum of its proper divisors (3650083).

113151581 is an equidigital number, since it uses as much as digits as its factorization.

113151581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3650082.

The product of its digits is 600, while the sum is 26.

The square root of 113151581 is about 10637.2731938218. The cubic root of 113151581 is about 483.6748906661.

The spelling of 113151581 in words is "one hundred thirteen million, one hundred fifty-one thousand, five hundred eighty-one".