2156170202 has 16 divisors (see below), whose sum is σ = 3269185920. Its totient is φ = 1066473648.

The previous prime is 2156170201. The next prime is 2156170207. The reversal of 2156170202 is 2020716512.

It is not an unprimeable number, because it can be changed into a prime (2156170201) 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, 133403 + ... + 148689.

It is an arithmetic number, because the mean of its divisors is an integer number (204324120).

Almost surely, 2^2156170202 is an apocalyptic number.

2156170202 is a deficient number, since it is larger than the sum of its proper divisors (1113015718).

2156170202 is a wasteful number, since it uses less digits than its factorization.

2156170202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16045.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 2156170202 is about 46434.5798085866. The cubic root of 2156170202 is about 1291.8963759639.

Adding to 2156170202 its reverse (2020716512), we get a palindrome (4176886714).

The spelling of 2156170202 in words is "two billion, one hundred fifty-six million, one hundred seventy thousand, two hundred two".