516421547 has 4 divisors (see below), whose sum is σ = 524887536. Its totient is φ = 507955560.

The previous prime is 516421541. The next prime is 516421561. The reversal of 516421547 is 745124615.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 516421547 - 2¹⁴ = 516405163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (516421541) 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, 4232903 + ... + 4233024.

It is an arithmetic number, because the mean of its divisors is an integer number (131221884).

Almost surely, 2^516421547 is an apocalyptic number.

516421547 is a deficient number, since it is larger than the sum of its proper divisors (8465989).

516421547 is an equidigital number, since it uses as much as digits as its factorization.

516421547 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8465988.

The product of its digits is 33600, while the sum is 35.

The square root of 516421547 is about 22724.9102748504. The cubic root of 516421547 is about 802.2962915624.

The spelling of 516421547 in words is "five hundred sixteen million, four hundred twenty-one thousand, five hundred forty-seven".