2155130 has 16 divisors (see below), whose sum is σ = 3943944. Its totient is φ = 847680.

The previous prime is 2155129. The next prime is 2155133. The reversal of 2155130 is 315512.

It can be written as a sum of positive squares in 4 ways, for example, as 1481089 + 674041 = 1217^2 + 821^2 .

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2155099 and 2155108.

It is not an unprimeable number, because it can be changed into a prime (2155133) 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, 1157 + ... + 2376.

2^2155130 is an apocalyptic number.

2155130 is a deficient number, since it is larger than the sum of its proper divisors (1788814).

2155130 is a wasteful number, since it uses less digits than its factorization.

2155130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3601.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 2155130 is about 1468.0361030983. The cubic root of 2155130 is about 129.1688592529.

The spelling of 2155130 in words is "two million, one hundred fifty-five thousand, one hundred thirty".