311157242 has 16 divisors (see below), whose sum is σ = 509537952. Its totient is φ = 141331920.

The previous prime is 311157227. The next prime is 311157247. The reversal of 311157242 is 242751113.

It is not an unprimeable number, because it can be changed into a prime (311157247) 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, 31448 + ... + 40140.

It is an arithmetic number, because the mean of its divisors is an integer number (31846122).

Almost surely, 2^311157242 is an apocalyptic number.

311157242 is a deficient number, since it is larger than the sum of its proper divisors (198380710).

311157242 is a wasteful number, since it uses less digits than its factorization.

311157242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10333.

The product of its digits is 1680, while the sum is 26.

The square root of 311157242 is about 17639.6497130754. The cubic root of 311157242 is about 677.6310604600.

The spelling of 311157242 in words is "three hundred eleven million, one hundred fifty-seven thousand, two hundred forty-two".