516421072 has 40 divisors (see below), whose sum is σ = 1014338600. Its totient is φ = 254679552.

The previous prime is 516421063. The next prime is 516421079. The reversal of 516421072 is 270124615.

It can be written as a sum of positive squares in 4 ways, for example, as 44836416 + 471584656 = 6696^2 + 21716^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 516421072.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (516421079) 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, 482554 + ... + 483622.

It is an arithmetic number, because the mean of its divisors is an integer number (25358465).

Almost surely, 2^516421072 is an apocalyptic number.

It is an amenable number.

516421072 is a deficient number, since it is larger than the sum of its proper divisors (497917528).

516421072 is a wasteful number, since it uses less digits than its factorization.

516421072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463 (or 1457 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 516421072 is about 22724.8998237616. The cubic root of 516421072 is about 802.2960455807.

Adding to 516421072 its reverse (270124615), we get a palindrome (786545687).

The spelling of 516421072 in words is "five hundred sixteen million, four hundred twenty-one thousand, seventy-two".