513642266 has 4 divisors (see below), whose sum is σ = 770463402. Its totient is φ = 256821132.

The previous prime is 513642253. The next prime is 513642271. The reversal of 513642266 is 662246315.

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: 662246315 = 5 ⋅132449263.

It can be written as a sum of positive squares in only one way, i.e., 348905041 + 164737225 = 18679^2 + 12835^2 .

It is a super-2 number, since 2×513642266² = 527656754843229512, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128410565 + ... + 128410568.

Almost surely, 2^513642266 is an apocalyptic number.

513642266 is a deficient number, since it is larger than the sum of its proper divisors (256821136).

513642266 is a wasteful number, since it uses less digits than its factorization.

513642266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256821135.

The product of its digits is 51840, while the sum is 35.

The square root of 513642266 is about 22663.6772391419. The cubic root of 513642266 is about 800.8544339783.

The spelling of 513642266 in words is "five hundred thirteen million, six hundred forty-two thousand, two hundred sixty-six".