311242431 has 8 divisors (see below), whose sum is σ = 415721520. Its totient is φ = 207129152.

The previous prime is 311242429. The next prime is 311242499. The reversal of 311242431 is 134242113.

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

It is a cyclic number.

It is not a de Polignac number, because 311242431 - 2¹ = 311242429 is a prime.

It is a super-2 number, since 2×311242431² = 193743701709579522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 311242398 and 311242407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311242411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89460 + ... + 92873.

It is an arithmetic number, because the mean of its divisors is an integer number (51965190).

Almost surely, 2^311242431 is an apocalyptic number.

311242431 is a deficient number, since it is larger than the sum of its proper divisors (104479089).

311242431 is a wasteful number, since it uses less digits than its factorization.

311242431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182905.

The product of its digits is 576, while the sum is 21.

The square root of 311242431 is about 17642.0642499680. The cubic root of 311242431 is about 677.6928956966.

Adding to 311242431 its reverse (134242113), we get a palindrome (445484544).

The spelling of 311242431 in words is "three hundred eleven million, two hundred forty-two thousand, four hundred thirty-one".