516721898 has 16 divisors (see below), whose sum is σ = 966337344. Its totient is φ = 201320160.

The previous prime is 516721897. The next prime is 516721943. The reversal of 516721898 is 898127615.

It is not an unprimeable number, because it can be changed into a prime (516721897) 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, 1677515 + ... + 1677822.

It is an arithmetic number, because the mean of its divisors is an integer number (60396084).

Almost surely, 2^516721898 is an apocalyptic number.

516721898 is a deficient number, since it is larger than the sum of its proper divisors (449615446).

516721898 is a wasteful number, since it uses less digits than its factorization.

516721898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3355357.

The product of its digits is 241920, while the sum is 47.

The square root of 516721898 is about 22731.5177231966. The cubic root of 516721898 is about 802.4518000443.

The spelling of 516721898 in words is "five hundred sixteen million, seven hundred twenty-one thousand, eight hundred ninety-eight".