31354130136 has 128 divisors (see below), whose sum is σ = 90928926720. Its totient is φ = 8824080384.

The previous prime is 31354130123. The next prime is 31354130161. The reversal of 31354130136 is 63103145313.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14629881 + ... + 14632023.

It is an arithmetic number, because the mean of its divisors is an integer number (710382240).

Almost surely, 2^31354130136 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31354130136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45464463360).

31354130136 is an abundant number, since it is smaller than the sum of its proper divisors (59574796584).

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

31354130136 is a wasteful number, since it uses less digits than its factorization.

31354130136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3425 (or 3421 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 30.

Adding to 31354130136 its reverse (63103145313), we get a palindrome (94457275449).

The spelling of 31354130136 in words is "thirty-one billion, three hundred fifty-four million, one hundred thirty thousand, one hundred thirty-six".