320481381 has 8 divisors (see below), whose sum is σ = 466154784. Its totient is φ = 194231120.

The previous prime is 320481377. The next prime is 320481401. The reversal of 320481381 is 183184023.

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 320481381 - 2² = 320481377 is a prime.

It is a super-2 number, since 2×320481381² = 205416631135334322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320481311) 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, 4855746 + ... + 4855811.

It is an arithmetic number, because the mean of its divisors is an integer number (58269348).

Almost surely, 2^320481381 is an apocalyptic number.

It is an amenable number.

320481381 is a deficient number, since it is larger than the sum of its proper divisors (145673403).

320481381 is a wasteful number, since it uses less digits than its factorization.

320481381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9711571.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 320481381 is about 17901.9937716445. The cubic root of 320481381 is about 684.3331859693. Note that the first 3 decimals are identical.

The spelling of 320481381 in words is "three hundred twenty million, four hundred eighty-one thousand, three hundred eighty-one".