311355047 has 2 divisors, whose sum is σ = 311355048. Its totient is φ = 311355046.

The previous prime is 311355029. The next prime is 311355061. The reversal of 311355047 is 740553113.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311355047 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311355007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155677523 + 155677524.

It is an arithmetic number, because the mean of its divisors is an integer number (155677524).

Almost surely, 2^311355047 is an apocalyptic number.

311355047 is a deficient number, since it is larger than the sum of its proper divisors (1).

311355047 is an equidigital number, since it uses as much as digits as its factorization.

311355047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 29.

The square root of 311355047 is about 17645.2556513075. The cubic root of 311355047 is about 677.7746217646.

The spelling of 311355047 in words is "three hundred eleven million, three hundred fifty-five thousand, forty-seven".