815467381 has 8 divisors (see below), whose sum is σ = 837402624. Its totient is φ = 793774800.

The previous prime is 815467363. The next prime is 815467399. The reversal of 815467381 is 183764518.

815467381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (815467363) and next prime (815467399).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 815467381 - 2⁵ = 815467349 is a prime.

It is a super-2 number, since 2×815467381² = 1329974098949998322, 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 (815467181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53845 + ... + 67306.

It is an arithmetic number, because the mean of its divisors is an integer number (104675328).

Almost surely, 2^815467381 is an apocalyptic number.

It is an amenable number.

815467381 is a deficient number, since it is larger than the sum of its proper divisors (21935243).

815467381 is a wasteful number, since it uses less digits than its factorization.

815467381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121331.

The product of its digits is 161280, while the sum is 43.

The square root of 815467381 is about 28556.3894951725. The cubic root of 815467381 is about 934.2623867905.

The spelling of 815467381 in words is "eight hundred fifteen million, four hundred sixty-seven thousand, three hundred eighty-one".