311431401240 has 32 divisors (see below), whose sum is σ = 934294204080. Its totient is φ = 83048373632.

The previous prime is 311431401221. The next prime is 311431401241. The reversal of 311431401240 is 42104134113.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 311431401240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311431401241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1297630719 + ... + 1297630958.

Almost surely, 2^311431401240 is an apocalyptic number.

311431401240 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

311431401240 is an abundant number, since it is smaller than the sum of its proper divisors (622862802840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

311431401240 is a wasteful number, since it uses less digits than its factorization.

311431401240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2595261691 (or 2595261687 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 311431401240 its reverse (42104134113), we get a palindrome (353535535353).

The spelling of 311431401240 in words is "three hundred eleven billion, four hundred thirty-one million, four hundred one thousand, two hundred forty".