516445442 has 4 divisors (see below), whose sum is σ = 774668166. Its totient is φ = 258222720.

The previous prime is 516445439. The next prime is 516445463. The reversal of 516445442 is 244544615.

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., 516243841 + 201601 = 22721^2 + 449^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129111359 + ... + 129111362.

Almost surely, 2^516445442 is an apocalyptic number.

516445442 is a deficient number, since it is larger than the sum of its proper divisors (258222724).

516445442 is a wasteful number, since it uses less digits than its factorization.

516445442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258222723.

The product of its digits is 76800, while the sum is 35.

The square root of 516445442 is about 22725.4360134190. The cubic root of 516445442 is about 802.3086655454.

The spelling of 516445442 in words is "five hundred sixteen million, four hundred forty-five thousand, four hundred forty-two".