516121643 has 8 divisors (see below), whose sum is σ = 546749520. Its totient is φ = 485840160.

The previous prime is 516121631. The next prime is 516121657. The reversal of 516121643 is 346121615.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 516121643 - 2²⁶ = 449012779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516121943) 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, 83528 + ... + 89493.

It is an arithmetic number, because the mean of its divisors is an integer number (68343690).

Almost surely, 2^516121643 is an apocalyptic number.

516121643 is a deficient number, since it is larger than the sum of its proper divisors (30627877).

516121643 is a wasteful number, since it uses less digits than its factorization.

516121643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173197.

The product of its digits is 4320, while the sum is 29.

The square root of 516121643 is about 22718.3107426587. The cubic root of 516121643 is about 802.1409543444.

The spelling of 516121643 in words is "five hundred sixteen million, one hundred twenty-one thousand, six hundred forty-three".