31102140040 has 128 divisors (see below), whose sum is σ = 73179832320. Its totient is φ = 11883571200.

The previous prime is 31102139989. The next prime is 31102140137. The reversal of 31102140040 is 4004120113.

It is a junction number, because it is equal to n+sod(n) for n = 31102139996 and 31102140023.

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, 37882830 + ... + 37883650.

It is an arithmetic number, because the mean of its divisors is an integer number (571717440).

Almost surely, 2^31102140040 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 31102140040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36589916160).

31102140040 is an abundant number, since it is smaller than the sum of its proper divisors (42077692280).

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

31102140040 is a wasteful number, since it uses less digits than its factorization.

31102140040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223 (or 1219 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 31102140040 its reverse (4004120113), we get a palindrome (35106260153).

The spelling of 31102140040 in words is "thirty-one billion, one hundred two million, one hundred forty thousand, forty".