311545145 has 8 divisors (see below), whose sum is σ = 395845704. Its totient is φ = 234575104.

The previous prime is 311545127. The next prime is 311545151. The reversal of 311545145 is 541545113.

It can be written as a sum of positive squares in 4 ways, for example, as 126067984 + 185477161 = 11228^2 + 13619^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 311545145 - 2²⁰ = 310496569 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1832534 + ... + 1832703.

It is an arithmetic number, because the mean of its divisors is an integer number (49480713).

Almost surely, 2^311545145 is an apocalyptic number.

It is an amenable number.

311545145 is a deficient number, since it is larger than the sum of its proper divisors (84300559).

311545145 is a wasteful number, since it uses less digits than its factorization.

311545145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3665259.

The product of its digits is 6000, while the sum is 29.

The square root of 311545145 is about 17650.6414897589. The cubic root of 311545145 is about 677.9125322608.

The spelling of 311545145 in words is "three hundred eleven million, five hundred forty-five thousand, one hundred forty-five".