31105204250540 has 96 divisors (see below), whose sum is σ = 75038506583040. Its totient is φ = 10609506480384.

The previous prime is 31105204250521. The next prime is 31105204250543. The reversal of 31105204250540 is 4505240250113.

It is a junction number, because it is equal to n+sod(n) for n = 31105204250497 and 31105204250506.

It is not an unprimeable number, because it can be changed into a prime (31105204250543) 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, 329782067 + ... + 329876373.

It is an arithmetic number, because the mean of its divisors is an integer number (781651110240).

Almost surely, 2^{31105204250540} 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 31105204250540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37519253291520).

31105204250540 is an abundant number, since it is smaller than the sum of its proper divisors (43933302332500).

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

31105204250540 is a wasteful number, since it uses less digits than its factorization.

31105204250540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106479 (or 106477 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

The spelling of 31105204250540 in words is "thirty-one trillion, one hundred five billion, two hundred four million, two hundred fifty thousand, five hundred forty".