1302312213 has 6 divisors (see below), whose sum is σ = 1881117654. Its totient is φ = 868208136.

The previous prime is 1302312211. The next prime is 1302312227. The reversal of 1302312213 is 3122132031.

It can be written as a sum of positive squares in only one way, i.e., 1135824804 + 166487409 = 33702^2 + 12903^2 .

It is not a de Polignac number, because 1302312213 - 2¹ = 1302312211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1302312211) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 72350670 + ... + 72350687.

It is an arithmetic number, because the mean of its divisors is an integer number (313519609).

Almost surely, 2^1302312213 is an apocalyptic number.

It is an amenable number.

1302312213 is a deficient number, since it is larger than the sum of its proper divisors (578805441).

1302312213 is a wasteful number, since it uses less digits than its factorization.

1302312213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144701363 (or 144701360 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1302312213 is about 36087.5631346867. The cubic root of 1302312213 is about 1092.0395595096.

Adding to 1302312213 its reverse (3122132031), we get a palindrome (4424444244).

The spelling of 1302312213 in words is "one billion, three hundred two million, three hundred twelve thousand, two hundred thirteen".