311244242 has 4 divisors (see below), whose sum is σ = 466866366. Its totient is φ = 155622120.

The previous prime is 311244223. The next prime is 311244251. The reversal of 311244242 is 242442113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 212022721 + 99221521 = 14561^2 + 9961^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77811059 + ... + 77811062.

Almost surely, 2^311244242 is an apocalyptic number.

311244242 is a deficient number, since it is larger than the sum of its proper divisors (155622124).

311244242 is a wasteful number, since it uses less digits than its factorization.

311244242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155622123.

The product of its digits is 1536, while the sum is 23.

The square root of 311244242 is about 17642.1155760867. The cubic root of 311244242 is about 677.6942101055.

Adding to 311244242 its reverse (242442113), we get a palindrome (553686355).

The spelling of 311244242 in words is "three hundred eleven million, two hundred forty-four thousand, two hundred forty-two".