3156381 has 8 divisors (see below), whose sum is σ = 4676160. Its totient is φ = 2104236.

The previous prime is 3156371. The next prime is 3156383. The reversal of 3156381 is 1836513.

It is not a de Polignac number, because 3156381 - 2⁶ = 3156317 is a prime.

It is a super-2 number, since 2×3156381² = 19925482034322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 116903 = 3156381 / (3 + 1 + 5 + 6 + 3 + 8 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3156383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58425 + ... + 58478.

It is an arithmetic number, because the mean of its divisors is an integer number (584520).

Almost surely, 2^3156381 is an apocalyptic number.

It is an amenable number.

3156381 is a deficient number, since it is larger than the sum of its proper divisors (1519779).

3156381 is a wasteful number, since it uses less digits than its factorization.

3156381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116912 (or 116906 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 3156381 is about 1776.6206685728. The cubic root of 3156381 is about 146.6886370898.

The spelling of 3156381 in words is "three million, one hundred fifty-six thousand, three hundred eighty-one".