381615 has 32 divisors (see below), whose sum is σ = 698880. Its totient is φ = 176256.

The previous prime is 381607. The next prime is 381629. The reversal of 381615 is 516183.

It is not a de Polignac number, because 381615 - 2³ = 381607 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 381615.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3654 + ... + 3756.

It is an arithmetic number, because the mean of its divisors is an integer number (21840).

2³⁸¹⁶¹⁵ is an apocalyptic number.

381615 is a deficient number, since it is larger than the sum of its proper divisors (317265).

381615 is a wasteful number, since it uses less digits than its factorization.

381615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143.

The product of its digits is 720, while the sum is 24.

The square root of 381615 is about 617.7499494132. The cubic root of 381615 is about 72.5340307935.

Adding to 381615 its reverse (516183), we get a palindrome (897798).

It can be divided in two parts, 38 and 1615, that added together give a triangular number (1653 = T₅₇).

The spelling of 381615 in words is "three hundred eighty-one thousand, six hundred fifteen".