197816516 has 6 divisors (see below), whose sum is σ = 346178910. Its totient is φ = 98908256.

The previous prime is 197816497. The next prime is 197816519. The reversal of 197816516 is 615618791.

It can be written as a sum of positive squares in only one way, i.e., 179292100 + 18524416 = 13390^2 + 4304^2 .

It is not an unprimeable number, because it can be changed into a prime (197816519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24727061 + ... + 24727068.

It is an arithmetic number, because the mean of its divisors is an integer number (57696485).

Almost surely, 2^197816516 is an apocalyptic number.

It is an amenable number.

197816516 is a deficient number, since it is larger than the sum of its proper divisors (148362394).

197816516 is a wasteful number, since it uses less digits than its factorization.

197816516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49454133 (or 49454131 counting only the distinct ones).

The product of its digits is 90720, while the sum is 44.

The square root of 197816516 is about 14064.7259482722. The cubic root of 197816516 is about 582.6675735896.

The spelling of 197816516 in words is "one hundred ninety-seven million, eight hundred sixteen thousand, five hundred sixteen".