381525663 has 4 divisors (see below), whose sum is σ = 508700888. Its totient is φ = 254350440.

The previous prime is 381525647. The next prime is 381525701. The reversal of 381525663 is 366525183.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 381525663 - 2⁴ = 381525647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381525163) 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, 63587608 + ... + 63587613.

It is an arithmetic number, because the mean of its divisors is an integer number (127175222).

Almost surely, 2^381525663 is an apocalyptic number.

381525663 is a deficient number, since it is larger than the sum of its proper divisors (127175225).

381525663 is a wasteful number, since it uses less digits than its factorization.

381525663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127175224.

The product of its digits is 129600, while the sum is 39.

The square root of 381525663 is about 19532.6819203099. The cubic root of 381525663 is about 725.2837022073.

The spelling of 381525663 in words is "three hundred eighty-one million, five hundred twenty-five thousand, six hundred sixty-three".