311402144 has 12 divisors (see below), whose sum is σ = 613073034. Its totient is φ = 155701056.

The previous prime is 311402137. The next prime is 311402167. The reversal of 311402144 is 441204113.

It can be written as a sum of positive squares in only one way, i.e., 275161744 + 36240400 = 16588^2 + 6020^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4865627 + ... + 4865690.

Almost surely, 2^311402144 is an apocalyptic number.

It is an amenable number.

311402144 is a deficient number, since it is larger than the sum of its proper divisors (301670890).

311402144 is an equidigital number, since it uses as much as digits as its factorization.

311402144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9731327 (or 9731319 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 311402144 is about 17646.5901522079. The cubic root of 311402144 is about 677.8087944797.

Adding to 311402144 its reverse (441204113), we get a palindrome (752606257).

The spelling of 311402144 in words is "three hundred eleven million, four hundred two thousand, one hundred forty-four".