31140034431 has 32 divisors (see below), whose sum is σ = 45556862208. Its totient is φ = 18763799040.

The previous prime is 31140034391. The next prime is 31140034447. The reversal of 31140034431 is 13443004113.

It is not a de Polignac number, because 31140034431 - 2¹¹ = 31140032383 is a prime.

It is a super-2 number, since 2×31140034431² (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 (31140034931) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4144380 + ... + 4151886.

It is an arithmetic number, because the mean of its divisors is an integer number (1423651944).

Almost surely, 2^31140034431 is an apocalyptic number.

31140034431 is a deficient number, since it is larger than the sum of its proper divisors (14416827777).

31140034431 is a wasteful number, since it uses less digits than its factorization.

31140034431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8231.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 31140034431 its reverse (13443004113), we get a palindrome (44583038544).

The spelling of 31140034431 in words is "thirty-one billion, one hundred forty million, thirty-four thousand, four hundred thirty-one".