513981442 has 16 divisors (see below), whose sum is σ = 858909240. Its totient is φ = 229041792.

The previous prime is 513981431. The next prime is 513981449. The reversal of 513981442 is 244189315.

It can be written as a sum of positive squares in 4 ways, for example, as 429359841 + 84621601 = 20721^2 + 9199^2 .

It is not an unprimeable number, because it can be changed into a prime (513981449) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 340083 + ... + 341590.

Almost surely, 2^513981442 is an apocalyptic number.

513981442 is a deficient number, since it is larger than the sum of its proper divisors (344927798).

513981442 is a wasteful number, since it uses less digits than its factorization.

513981442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681717.

The product of its digits is 34560, while the sum is 37.

The square root of 513981442 is about 22671.1588146702. The cubic root of 513981442 is about 801.0306726139.

The spelling of 513981442 in words is "five hundred thirteen million, nine hundred eighty-one thousand, four hundred forty-two".