311395049 has 6 divisors (see below), whose sum is σ = 362235114. Its totient is φ = 266910000.

The previous prime is 311395043. The next prime is 311395061. The reversal of 311395049 is 940593113.

It can be written as a sum of positive squares in only one way, i.e., 302586025 + 8809024 = 17395^2 + 2968^2 .

It is a de Polignac number, because none of the positive numbers 2^k-311395049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (311395043) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3177452 + ... + 3177549.

It is an arithmetic number, because the mean of its divisors is an integer number (60372519).

Almost surely, 2^311395049 is an apocalyptic number.

It is an amenable number.

311395049 is a deficient number, since it is larger than the sum of its proper divisors (50840065).

311395049 is an equidigital number, since it uses as much as digits as its factorization.

311395049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6355015 (or 6355008 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 311395049 is about 17646.3891207238. The cubic root of 311395049 is about 677.8036466989.

The spelling of 311395049 in words is "three hundred eleven million, three hundred ninety-five thousand, forty-nine".