311231231045 has 16 divisors (see below), whose sum is σ = 426841863168. Its totient is φ = 213410471040.

The previous prime is 311231231039. The next prime is 311231231057. The reversal of 311231231045 is 540132132113.

It is a de Polignac number, because none of the positive numbers 2^k-311231231045 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1821065 + ... + 1984625.

It is an arithmetic number, because the mean of its divisors is an integer number (26677616448).

Almost surely, 2^311231231045 is an apocalyptic number.

311231231045 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

311231231045 is a deficient number, since it is larger than the sum of its proper divisors (115610632123).

311231231045 is a wasteful number, since it uses less digits than its factorization.

311231231045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217940.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 311231231045 its reverse (540132132113), we get a palindrome (851363363158).

The spelling of 311231231045 in words is "three hundred eleven billion, two hundred thirty-one million, two hundred thirty-one thousand, forty-five".