516145442 has 4 divisors (see below), whose sum is σ = 774218166. Its totient is φ = 258072720.

The previous prime is 516145417. The next prime is 516145453. The reversal of 516145442 is 244541615.

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

It can be written as a sum of positive squares in only one way, i.e., 380679121 + 135466321 = 19511^2 + 11639^2 .

It is a super-2 number, since 2×516145442² = 532812234594750728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 516145399 and 516145408.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129036359 + ... + 129036362.

Almost surely, 2^516145442 is an apocalyptic number.

516145442 is a deficient number, since it is larger than the sum of its proper divisors (258072724).

516145442 is a wasteful number, since it uses less digits than its factorization.

516145442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258072723.

The product of its digits is 19200, while the sum is 32.

The square root of 516145442 is about 22718.8345211633. The cubic root of 516145442 is about 802.1532833883.

The spelling of 516145442 in words is "five hundred sixteen million, one hundred forty-five thousand, four hundred forty-two".