311154215845 has 12 divisors (see below), whose sum is σ = 410414983020. Its totient is φ = 226293974720.

The previous prime is 311154215821. The next prime is 311154215849. The reversal of 311154215845 is 548512451113.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 153238582849 + 157915632996 = 391457^2 + 397386^2 .

It is not a de Polignac number, because 311154215845 - 2³¹ = 309006732197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 311154215798 and 311154215807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311154215849) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 257151640 + ... + 257152849.

It is an arithmetic number, because the mean of its divisors is an integer number (34201248585).

Almost surely, 2^311154215845 is an apocalyptic number.

It is an amenable number.

311154215845 is a deficient number, since it is larger than the sum of its proper divisors (99260767175).

311154215845 is a wasteful number, since it uses less digits than its factorization.

311154215845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514304516 (or 514304505 counting only the distinct ones).

The product of its digits is 96000, while the sum is 40.

Adding to 311154215845 its reverse (548512451113), we get a palindrome (859666666958).

The spelling of 311154215845 in words is "three hundred eleven billion, one hundred fifty-four million, two hundred fifteen thousand, eight hundred forty-five".