115447381 has 6 divisors (see below), whose sum is σ = 134295990. Its totient is φ = 98954856.

The previous prime is 115447337. The next prime is 115447393. The reversal of 115447381 is 183744511.

It can be written as a sum of positive squares in only one way, i.e., 72335025 + 43112356 = 8505^2 + 6566^2 .

It is not a de Polignac number, because 115447381 - 2⁷ = 115447253 is a prime.

It is a super-2 number, since 2×115447381² = 26656195559518322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115447301) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1177986 + ... + 1178083.

It is an arithmetic number, because the mean of its divisors is an integer number (22382665).

Almost surely, 2^115447381 is an apocalyptic number.

It is an amenable number.

115447381 is a deficient number, since it is larger than the sum of its proper divisors (18848609).

115447381 is an equidigital number, since it uses as much as digits as its factorization.

115447381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2356083 (or 2356076 counting only the distinct ones).

The product of its digits is 13440, while the sum is 34.

The square root of 115447381 is about 10744.6442937866. The cubic root of 115447381 is about 486.9242025822.

The spelling of 115447381 in words is "one hundred fifteen million, four hundred forty-seven thousand, three hundred eighty-one".