513225842 has 4 divisors (see below), whose sum is σ = 769838766. Its totient is φ = 256612920.

The previous prime is 513225809. The next prime is 513225851. The reversal of 513225842 is 248522315.

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., 332296441 + 180929401 = 18229^2 + 13451^2 .

It is a junction number, because it is equal to n+sod(n) for n = 513225799 and 513225808.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128306459 + ... + 128306462.

Almost surely, 2^513225842 is an apocalyptic number.

513225842 is a deficient number, since it is larger than the sum of its proper divisors (256612924).

513225842 is a wasteful number, since it uses less digits than its factorization.

513225842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256612923.

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

The square root of 513225842 is about 22654.4883411654. The cubic root of 513225842 is about 800.6379505137.

The spelling of 513225842 in words is "five hundred thirteen million, two hundred twenty-five thousand, eight hundred forty-two".