311321132 has 6 divisors (see below), whose sum is σ = 544811988. Its totient is φ = 155660564.

The previous prime is 311321089. The next prime is 311321147. The reversal of 311321132 is 231123113.

It is a super-2 number, since 2×311321132² = 193841694459522848, 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 311321132.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38915138 + ... + 38915145.

It is an arithmetic number, because the mean of its divisors is an integer number (90801998).

Almost surely, 2^311321132 is an apocalyptic number.

It is an amenable number.

311321132 is a deficient number, since it is larger than the sum of its proper divisors (233490856).

311321132 is a wasteful number, since it uses less digits than its factorization.

311321132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77830287 (or 77830285 counting only the distinct ones).

The product of its digits is 108, while the sum is 17.

The square root of 311321132 is about 17644.2946019386. The cubic root of 311321132 is about 677.7500115314.

Adding to 311321132 its reverse (231123113), we get a palindrome (542444245).

The spelling of 311321132 in words is "three hundred eleven million, three hundred twenty-one thousand, one hundred thirty-two".