2155131 has 18 divisors (see below), whose sum is σ = 3423420. Its totient is φ = 1305480.

The previous prime is 2155129. The next prime is 2155133. The reversal of 2155131 is 1315512.

2155131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2155129) and next prime (2155133).

It is not a de Polignac number, because 2155131 - 2¹ = 2155129 is a prime.

It is a super-2 number, since 2×2155131² = 9289179254322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2155133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 100 + ... + 2078.

It is an arithmetic number, because the mean of its divisors is an integer number (190190).

2^2155131 is an apocalyptic number.

2155131 is a deficient number, since it is larger than the sum of its proper divisors (1268289).

2155131 is a wasteful number, since it uses less digits than its factorization.

2155131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007 (or 1993 counting only the distinct ones).

The product of its digits is 150, while the sum is 18.

The square root of 2155131 is about 1468.0364436893. The cubic root of 2155131 is about 129.1688792314.

The spelling of 2155131 in words is "two million, one hundred fifty-five thousand, one hundred thirty-one".