381315 has 16 divisors (see below), whose sum is σ = 665856. Its totient is φ = 184800.

The previous prime is 381301. The next prime is 381319. The reversal of 381315 is 513183.

381315 = 121² + 122² + ... + 142².

It is a happy number.

It is not a de Polignac number, because 381315 - 2⁹ = 380803 is a prime.

It is a super-2 number, since 2×381315² = 290802258450, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 381291 and 381300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 991 + ... + 1320.

It is an arithmetic number, because the mean of its divisors is an integer number (41616).

2³⁸¹³¹⁵ is an apocalyptic number.

381315 is a deficient number, since it is larger than the sum of its proper divisors (284541).

381315 is a wasteful number, since it uses less digits than its factorization.

381315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2330.

The product of its digits is 360, while the sum is 21.

The square root of 381315 is about 617.5070849796. The cubic root of 381315 is about 72.5150186880.

Adding to 381315 its reverse (513183), we get a palindrome (894498).

It can be divided in two parts, 3813 and 15, that added together give a triangular number (3828 = T₈₇).

The spelling of 381315 in words is "three hundred eighty-one thousand, three hundred fifteen".