311221042 has 8 divisors (see below), whose sum is σ = 509270832. Its totient is φ = 141464100.

The previous prime is 311221039. The next prime is 311221061. The reversal of 311221042 is 240122113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7073184 + ... + 7073227.

It is an arithmetic number, because the mean of its divisors is an integer number (63658854).

Almost surely, 2^311221042 is an apocalyptic number.

311221042 is a deficient number, since it is larger than the sum of its proper divisors (198049790).

311221042 is a wasteful number, since it uses less digits than its factorization.

311221042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14146424.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 311221042 is about 17641.4580463181. The cubic root of 311221042 is about 677.6773713508.

Adding to 311221042 its reverse (240122113), we get a palindrome (551343155).

The spelling of 311221042 in words is "three hundred eleven million, two hundred twenty-one thousand, forty-two".