31434042340 has 12 divisors (see below), whose sum is σ = 66011488956. Its totient is φ = 12573616928.

The previous prime is 31434042259. The next prime is 31434042407. The reversal of 31434042340 is 4324043413.

It can be written as a sum of positive squares in 2 ways, for example, as 13129034724 + 18305007616 = 114582^2 + 135296^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31434042299 and 31434042308.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 785851039 + ... + 785851078.

It is an arithmetic number, because the mean of its divisors is an integer number (5500957413).

Almost surely, 2^31434042340 is an apocalyptic number.

It is an amenable number.

31434042340 is an abundant number, since it is smaller than the sum of its proper divisors (34577446616).

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

31434042340 is a wasteful number, since it uses less digits than its factorization.

31434042340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571702126 (or 1571702124 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 28.

Adding to 31434042340 its reverse (4324043413), we get a palindrome (35758085753).

The spelling of 31434042340 in words is "thirty-one billion, four hundred thirty-four million, forty-two thousand, three hundred forty".