381522 has 8 divisors (see below), whose sum is σ = 763056. Its totient is φ = 127172.

The previous prime is 381509. The next prime is 381523. The reversal of 381522 is 225183.

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

381522 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (381523) by changing a digit.

381522 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31788 + ... + 31799.

It is an arithmetic number, because the mean of its divisors is an integer number (95382).

2³⁸¹⁵²² is an apocalyptic number.

381522 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

381522 is a wasteful number, since it uses less digits than its factorization.

381522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63592.

The product of its digits is 480, while the sum is 21.

The square root of 381522 is about 617.6746716517. The cubic root of 381522 is about 72.5281381068.

Subtracting from 381522 its sum of digits (21), we obtain a triangular number (381501 = T₈₇₃).

It can be divided in two parts, 381 and 522, that added together give a triangular number (903 = T₄₂).

The spelling of 381522 in words is "three hundred eighty-one thousand, five hundred twenty-two".