311325205445 has 4 divisors (see below), whose sum is σ = 373590246540. Its totient is φ = 249060164352.

The previous prime is 311325205397. The next prime is 311325205469. The reversal of 311325205445 is 544502523113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 544502523113 = 108821 ⋅5003653.

It can be written as a sum of positive squares in 2 ways, for example, as 68242680289 + 243082525156 = 261233^2 + 493034^2 .

It is a cyclic number.

It is not a de Polignac number, because 311325205445 - 2¹⁴ = 311325189061 is a prime.

It is a super-3 number, since 3×311325205445³ (a number of 35 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31132520540 + ... + 31132520549.

It is an arithmetic number, because the mean of its divisors is an integer number (93397561635).

Almost surely, 2^311325205445 is an apocalyptic number.

It is an amenable number.

311325205445 is a deficient number, since it is larger than the sum of its proper divisors (62265041095).

311325205445 is an equidigital number, since it uses as much as digits as its factorization.

311325205445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62265041094.

The product of its (nonzero) digits is 72000, while the sum is 35.

Adding to 311325205445 its reverse (544502523113), we get a palindrome (855827728558).

The spelling of 311325205445 in words is "three hundred eleven billion, three hundred twenty-five million, two hundred five thousand, four hundred forty-five".