2177165042 has 16 divisors (see below), whose sum is σ = 3523889880. Its totient is φ = 1002865152.

The previous prime is 2177165041. The next prime is 2177165069. The reversal of 2177165042 is 2405617712.

It can be written as a sum of positive squares in 4 ways, for example, as 1404825361 + 772339681 = 37481^2 + 27791^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2177164993 and 2177165011.

It is not an unprimeable number, because it can be changed into a prime (2177165041) 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, 69023 + ... + 95490.

Almost surely, 2^2177165042 is an apocalyptic number.

2177165042 is a deficient number, since it is larger than the sum of its proper divisors (1346724838).

2177165042 is a wasteful number, since it uses less digits than its factorization.

2177165042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165037.

The product of its (nonzero) digits is 23520, while the sum is 35.

The square root of 2177165042 is about 46660.1011786301. The cubic root of 2177165042 is about 1296.0759466398.

The spelling of 2177165042 in words is "two billion, one hundred seventy-seven million, one hundred sixty-five thousand, forty-two".