311545013 has 8 divisors (see below), whose sum is σ = 337521408. Its totient is φ = 285855984.

The previous prime is 311545001. The next prime is 311545021. The reversal of 311545013 is 310545113.

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 311545013 - 2⁶ = 311544949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 311545013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311545063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69581 + ... + 73922.

It is an arithmetic number, because the mean of its divisors is an integer number (42190176).

Almost surely, 2^311545013 is an apocalyptic number.

It is an amenable number.

311545013 is a deficient number, since it is larger than the sum of its proper divisors (25976395).

311545013 is a wasteful number, since it uses less digits than its factorization.

311545013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143683.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 311545013 is about 17650.6377505177. The cubic root of 311545013 is about 677.9124365182.

The spelling of 311545013 in words is "three hundred eleven million, five hundred forty-five thousand, thirteen".