2165031 has 24 divisors (see below), whose sum is σ = 3594240. Its totient is φ = 1242000.

The previous prime is 2165029. The next prime is 2165039. The reversal of 2165031 is 1305612.

It is not a de Polignac number, because 2165031 - 2¹ = 2165029 is a prime.

It is a super-2 number, since 2×2165031² = 9374718461922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2164995 and 2165013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165039) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1306 + ... + 2456.

It is an arithmetic number, because the mean of its divisors is an integer number (149760).

2^2165031 is an apocalyptic number.

2165031 is a deficient number, since it is larger than the sum of its proper divisors (1429209).

2165031 is a wasteful number, since it uses less digits than its factorization.

2165031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187 (or 1184 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 2165031 is about 1471.4044311473. The cubic root of 2165031 is about 129.3663643329.

The spelling of 2165031 in words is "two million, one hundred sixty-five thousand, thirty-one".