311320047 has 4 divisors (see below), whose sum is σ = 415093400. Its totient is φ = 207546696.

The previous prime is 311320021. The next prime is 311320063. The reversal of 311320047 is 740023113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740023113 = 3 ⋅246674371.

It is not a de Polignac number, because 311320047 - 2⁷ = 311319919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311320007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51886672 + ... + 51886677.

It is an arithmetic number, because the mean of its divisors is an integer number (103773350).

Almost surely, 2^311320047 is an apocalyptic number.

311320047 is a deficient number, since it is larger than the sum of its proper divisors (103773353).

311320047 is a wasteful number, since it uses less digits than its factorization.

311320047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103773352.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 311320047 is about 17644.2638554290. The cubic root of 311320047 is about 677.7492241776.

The spelling of 311320047 in words is "three hundred eleven million, three hundred twenty thousand, forty-seven".