381590161 has 4 divisors (see below), whose sum is σ = 381637872. Its totient is φ = 381542452.

The previous prime is 381590159. The next prime is 381590201. The reversal of 381590161 is 161095183.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 381590161 - 2¹ = 381590159 is a prime.

It is a super-2 number, since 2×381590161² = 291222101944011842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381560161) 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, 8611 + ... + 28936.

It is an arithmetic number, because the mean of its divisors is an integer number (95409468).

Almost surely, 2^381590161 is an apocalyptic number.

It is an amenable number.

381590161 is a deficient number, since it is larger than the sum of its proper divisors (47711).

381590161 is a wasteful number, since it uses less digits than its factorization.

381590161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47710.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 381590161 is about 19534.3328782941. The cubic root of 381590161 is about 725.3245703296.

The spelling of 381590161 in words is "three hundred eighty-one million, five hundred ninety thousand, one hundred sixty-one".