2015381 has 4 divisors (see below), whose sum is σ = 2049600. Its totient is φ = 1981164.

The previous prime is 2015371. The next prime is 2015393. The reversal of 2015381 is 1835102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2015381 - 2⁶ = 2015317 is a prime.

It is a super-2 number, since 2×2015381² = 8123521150322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2015371) 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, 17021 + ... + 17138.

It is an arithmetic number, because the mean of its divisors is an integer number (512400).

2^2015381 is an apocalyptic number.

It is an amenable number.

2015381 is a deficient number, since it is larger than the sum of its proper divisors (34219).

2015381 is an equidigital number, since it uses as much as digits as its factorization.

2015381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34218.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 2015381 is about 1419.6411518408. The cubic root of 2015381 is about 126.3142613089.

The spelling of 2015381 in words is "two million, fifteen thousand, three hundred eighty-one".