2161610 has 32 divisors (see below), whose sum is σ = 4352832. Its totient is φ = 766080.

The previous prime is 2161591. The next prime is 2161613. The reversal of 2161610 is 161612.

2161610 = T₂₀ + T₂₁ + ... + T₂₃₄.

It is a happy number.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (2161613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4502 + ... + 4958.

It is an arithmetic number, because the mean of its divisors is an integer number (136026).

2^2161610 is an apocalyptic number.

2161610 is an abundant number, since it is smaller than the sum of its proper divisors (2191222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2161610 is a wasteful number, since it uses less digits than its factorization.

2161610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 2161610 is about 1470.2414767650. The cubic root of 2161610 is about 129.2981904612.

The spelling of 2161610 in words is "two million, one hundred sixty-one thousand, six hundred ten".