311553049 has 2 divisors, whose sum is σ = 311553050. Its totient is φ = 311553048.

The previous prime is 311553037. The next prime is 311553059. The reversal of 311553049 is 940355113.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 307371024 + 4182025 = 17532^2 + 2045^2 .

It is an emirp because it is prime and its reverse (940355113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311553049 - 2¹⁵ = 311520281 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 311553049.

It is not a weakly prime, because it can be changed into another prime (311553019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155776524 + 155776525.

It is an arithmetic number, because the mean of its divisors is an integer number (155776525).

Almost surely, 2^311553049 is an apocalyptic number.

It is an amenable number.

311553049 is a deficient number, since it is larger than the sum of its proper divisors (1).

311553049 is an equidigital number, since it uses as much as digits as its factorization.

311553049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 311553049 is about 17650.8653895496. The cubic root of 311553049 is about 677.9182651649.

The spelling of 311553049 in words is "three hundred eleven million, five hundred fifty-three thousand, forty-nine".