312111531444 has 48 divisors (see below), whose sum is σ = 746752849920. Its totient is φ = 101405482080.

The previous prime is 312111531421. The next prime is 312111531449. The reversal of 312111531444 is 444135111213.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312111531449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 384222 + ... + 878549.

It is an arithmetic number, because the mean of its divisors is an integer number (15557351040).

Almost surely, 2^312111531444 is an apocalyptic number.

It is an amenable number.

312111531444 is an abundant number, since it is smaller than the sum of its proper divisors (434641318476).

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

312111531444 is a wasteful number, since it uses less digits than its factorization.

312111531444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263300 (or 1263298 counting only the distinct ones).

The product of its digits is 5760, while the sum is 30.

Adding to 312111531444 its reverse (444135111213), we get a palindrome (756246642657).

The spelling of 312111531444 in words is "three hundred twelve billion, one hundred eleven million, five hundred thirty-one thousand, four hundred forty-four".