2051171670 has 16 divisors (see below), whose sum is σ = 4922812080. Its totient is φ = 546979104.

The previous prime is 2051171663. The next prime is 2051171677. The reversal of 2051171670 is 761711502.

It is an interprime number because it is at equal distance from previous prime (2051171663) and next prime (2051171677).

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 68372389 = 2051171670 / (2 + 0 + 5 + 1 + 1 + 7 + 1 + 6 + 7 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051171677) 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, 34186165 + ... + 34186224.

It is an arithmetic number, because the mean of its divisors is an integer number (307675755).

Almost surely, 2^2051171670 is an apocalyptic number.

2051171670 is an abundant number, since it is smaller than the sum of its proper divisors (2871640410).

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

2051171670 is a wasteful number, since it uses less digits than its factorization.

2051171670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68372399.

The product of its (nonzero) digits is 2940, while the sum is 30.

The square root of 2051171670 is about 45289.8627730312. The cubic root of 2051171670 is about 1270.5760649466.

The spelling of 2051171670 in words is "two billion, fifty-one million, one hundred seventy-one thousand, six hundred seventy".