311201242 has 16 divisors (see below), whose sum is σ = 513130464. Its totient is φ = 140374000.

The previous prime is 311201237. The next prime is 311201249. The reversal of 311201242 is 242102113.

It is not an unprimeable number, because it can be changed into a prime (311201249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51109 + ... + 56872.

It is an arithmetic number, because the mean of its divisors is an integer number (32070654).

Almost surely, 2^311201242 is an apocalyptic number.

311201242 is a deficient number, since it is larger than the sum of its proper divisors (201929222).

311201242 is a wasteful number, since it uses less digits than its factorization.

311201242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108125.

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

The square root of 311201242 is about 17640.8968592869. The cubic root of 311201242 is about 677.6629996827.

Adding to 311201242 its reverse (242102113), we get a palindrome (553303355).

The spelling of 311201242 in words is "three hundred eleven million, two hundred one thousand, two hundred forty-two".