516221739 has 24 divisors (see below), whose sum is σ = 827236800. Its totient is φ = 307555440.

The previous prime is 516221723. The next prime is 516221753. The reversal of 516221739 is 937122615.

It is not a de Polignac number, because 516221739 - 2⁴ = 516221723 is a prime.

It is not an unprimeable number, because it can be changed into a prime (516221789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38349 + ... + 50030.

It is an arithmetic number, because the mean of its divisors is an integer number (34468200).

Almost surely, 2^516221739 is an apocalyptic number.

516221739 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

516221739 is a deficient number, since it is larger than the sum of its proper divisors (311015061).

516221739 is a wasteful number, since it uses less digits than its factorization.

516221739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88455 (or 88452 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 516221739 is about 22720.5136165537. The cubic root of 516221739 is about 802.1928064043.

It can be divided in two parts, 51622 and 1739, that added together give a square (53361 = 231²).

The spelling of 516221739 in words is "five hundred sixteen million, two hundred twenty-one thousand, seven hundred thirty-nine".