2045999971 has 16 divisors (see below), whose sum is σ = 2216712960. Its totient is φ = 1882409760.

The previous prime is 2045999957. The next prime is 2045999987. The reversal of 2045999971 is 1799995402.

It is a cyclic number.

It is not a de Polignac number, because 2045999971 - 2⁵ = 2045999939 is a prime.

It is a super-2 number, since 2×2045999971² = 8372231762664001682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2045999171) 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, 79065 + ... + 101701.

It is an arithmetic number, because the mean of its divisors is an integer number (138544560).

Almost surely, 2^2045999971 is an apocalyptic number.

2045999971 is a deficient number, since it is larger than the sum of its proper divisors (170712989).

2045999971 is a wasteful number, since it uses less digits than its factorization.

2045999971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22794.

The product of its (nonzero) digits is 1837080, while the sum is 55.

The square root of 2045999971 is about 45232.7311910302. The cubic root of 2045999971 is about 1269.5073152472.

The spelling of 2045999971 in words is "two billion, forty-five million, nine hundred ninety-nine thousand, nine hundred seventy-one".