516259442 has 4 divisors (see below), whose sum is σ = 774389166. Its totient is φ = 258129720.

The previous prime is 516259441. The next prime is 516259459. The reversal of 516259442 is 244952615.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244952615 = 5 ⋅48990523.

It can be written as a sum of positive squares in only one way, i.e., 443481481 + 72777961 = 21059^2 + 8531^2 .

It is a super-2 number, since 2×516259442² = 533047622908302728, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 516259396 and 516259405.

It is not an unprimeable number, because it can be changed into a prime (516259441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129064859 + ... + 129064862.

Almost surely, 2^516259442 is an apocalyptic number.

516259442 is a deficient number, since it is larger than the sum of its proper divisors (258129724).

516259442 is a wasteful number, since it uses less digits than its factorization.

516259442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258129723.

The product of its digits is 86400, while the sum is 38.

The square root of 516259442 is about 22721.3433141617. The cubic root of 516259442 is about 802.2123356988.

The spelling of 516259442 in words is "five hundred sixteen million, two hundred fifty-nine thousand, four hundred forty-two".