381662331 has 4 divisors (see below), whose sum is σ = 508883112. Its totient is φ = 254441552.

The previous prime is 381662287. The next prime is 381662339. The reversal of 381662331 is 133266183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133266183 = 3 ⋅44422061.

It is a cyclic number.

It is not a de Polignac number, because 381662331 - 2¹¹ = 381660283 is a prime.

It is a super-2 number, since 2×381662331² = 291332269808707122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 381662292 and 381662301.

It is not an unprimeable number, because it can be changed into a prime (381662339) 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, 63610386 + ... + 63610391.

It is an arithmetic number, because the mean of its divisors is an integer number (127220778).

Almost surely, 2^381662331 is an apocalyptic number.

381662331 is a deficient number, since it is larger than the sum of its proper divisors (127220781).

381662331 is a wasteful number, since it uses less digits than its factorization.

381662331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127220780.

The product of its digits is 15552, while the sum is 33.

The square root of 381662331 is about 19536.1800513816. The cubic root of 381662331 is about 725.3702942326.

The spelling of 381662331 in words is "three hundred eighty-one million, six hundred sixty-two thousand, three hundred thirty-one".