511971897 has 16 divisors (see below), whose sum is σ = 689040000. Its totient is φ = 338121984.

The previous prime is 511971883. The next prime is 511971931. The reversal of 511971897 is 798179115.

It is not a de Polignac number, because 511971897 - 2⁶ = 511971833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (511971827) 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, 194929 + ... + 197537.

It is an arithmetic number, because the mean of its divisors is an integer number (43065000).

Almost surely, 2^511971897 is an apocalyptic number.

It is an amenable number.

511971897 is a deficient number, since it is larger than the sum of its proper divisors (177068103).

511971897 is a wasteful number, since it uses less digits than its factorization.

511971897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200.

The product of its digits is 158760, while the sum is 48.

The square root of 511971897 is about 22626.7959950144. The cubic root of 511971897 is about 799.9853627530.

The spelling of 511971897 in words is "five hundred eleven million, nine hundred seventy-one thousand, eight hundred ninety-seven".