31301140440 has 32 divisors (see below), whose sum is σ = 93903421680. Its totient is φ = 8346970752.

The previous prime is 31301140433. The next prime is 31301140441. The reversal of 31301140440 is 4404110313.

It is a super-2 number, since 2×31301140440² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31301140441) 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, 130421299 + ... + 130421538.

Almost surely, 2^31301140440 is an apocalyptic number.

31301140440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31301140440 is an abundant number, since it is smaller than the sum of its proper divisors (62602281240).

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

31301140440 is a wasteful number, since it uses less digits than its factorization.

31301140440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260842851 (or 260842847 counting only the distinct ones).

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

Adding to 31301140440 its reverse (4404110313), we get a palindrome (35705250753).

The spelling of 31301140440 in words is "thirty-one billion, three hundred one million, one hundred forty thousand, four hundred forty".