1302231213 has 12 divisors (see below), whose sum is σ = 1882774140. Its totient is φ = 867335616.

The previous prime is 1302231157. The next prime is 1302231223. The reversal of 1302231213 is 3121322031.

It can be written as a sum of positive squares in 2 ways, for example, as 756635049 + 545596164 = 27507^2 + 23358^2 .

It is not a de Polignac number, because 1302231213 - 2⁶ = 1302231149 is a prime.

It is a super-2 number, since 2×1302231213² = 3391612264222902738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1302231223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58056 + ... + 77297.

It is an arithmetic number, because the mean of its divisors is an integer number (156897845).

Almost surely, 2^1302231213 is an apocalyptic number.

It is an amenable number.

1302231213 is a deficient number, since it is larger than the sum of its proper divisors (580542927).

1302231213 is a wasteful number, since it uses less digits than its factorization.

1302231213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136428 (or 136425 counting only the distinct ones).

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

The square root of 1302231213 is about 36086.4408469442. The cubic root of 1302231213 is about 1092.0169184876.

Adding to 1302231213 its reverse (3121322031), we get a palindrome (4423553244).

The spelling of 1302231213 in words is "one billion, three hundred two million, two hundred thirty-one thousand, two hundred thirteen".