1313210506 has 4 divisors (see below), whose sum is σ = 1969815762. Its totient is φ = 656605252.

The previous prime is 1313210491. The next prime is 1313210513. The reversal of 1313210506 is 6050123131.

It is a happy number.

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., 920576281 + 392634225 = 30341^2 + 19815^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328302625 + ... + 328302628.

Almost surely, 2^1313210506 is an apocalyptic number.

1313210506 is a deficient number, since it is larger than the sum of its proper divisors (656605256).

1313210506 is an equidigital number, since it uses as much as digits as its factorization.

1313210506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656605255.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 1313210506 is about 36238.2464531605. The cubic root of 1313210506 is about 1095.0773159755.

Adding to 1313210506 its reverse (6050123131), we get a palindrome (7363333637).

The spelling of 1313210506 in words is "one billion, three hundred thirteen million, two hundred ten thousand, five hundred six".