1312231302 has 48 divisors (see below), whose sum is σ = 2947771008. Its totient is φ = 421441920.

The previous prime is 1312231253. The next prime is 1312231313. The reversal of 1312231302 is 2031322131.

1312231302 is a `hidden beast` number, since 131 + 2 + 231 + 302 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124968 + ... + 135060.

It is an arithmetic number, because the mean of its divisors is an integer number (61411896).

Almost surely, 2^1312231302 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312231302, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1473885504).

1312231302 is an abundant number, since it is smaller than the sum of its proper divisors (1635539706).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1312231302 is a wasteful number, since it uses less digits than its factorization.

1312231302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10365 (or 10362 counting only the distinct ones).

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

The square root of 1312231302 is about 36224.7332909436. The cubic root of 1312231302 is about 1094.8050644420.

Adding to 1312231302 its reverse (2031322131), we get a palindrome (3343553433).

The spelling of 1312231302 in words is "one billion, three hundred twelve million, two hundred thirty-one thousand, three hundred two".