516197561 has 4 divisors (see below), whose sum is σ = 563124624. Its totient is φ = 469270500.

The previous prime is 516197551. The next prime is 516197587. The reversal of 516197561 is 165791615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 516197561 - 2⁶ = 516197497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (516197551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23463515 + ... + 23463536.

It is an arithmetic number, because the mean of its divisors is an integer number (140781156).

Almost surely, 2^516197561 is an apocalyptic number.

It is an amenable number.

516197561 is a deficient number, since it is larger than the sum of its proper divisors (46927063).

516197561 is a wasteful number, since it uses less digits than its factorization.

516197561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46927062.

The product of its digits is 56700, while the sum is 41.

The square root of 516197561 is about 22719.9815360840. The cubic root of 516197561 is about 802.1802822511.

The spelling of 516197561 in words is "five hundred sixteen million, one hundred ninety-seven thousand, five hundred sixty-one".