1231313302 has 4 divisors (see below), whose sum is σ = 1846969956. Its totient is φ = 615656650.

The previous prime is 1231313287. The next prime is 1231313323. The reversal of 1231313302 is 2033131321.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×1231313302² = 3032264895364286408, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1231313302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307828324 + ... + 307828327.

It is an arithmetic number, because the mean of its divisors is an integer number (461742489).

Almost surely, 2^1231313302 is an apocalyptic number.

1231313302 is a deficient number, since it is larger than the sum of its proper divisors (615656654).

1231313302 is an equidigital number, since it uses as much as digits as its factorization.

1231313302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 615656653.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1231313302 is about 35090.0741236037. The cubic root of 1231313302 is about 1071.8224690001.

Adding to 1231313302 its reverse (2033131321), we get a palindrome (3264444623).

The spelling of 1231313302 in words is "one billion, two hundred thirty-one million, three hundred thirteen thousand, three hundred two".