31441402540 has 24 divisors (see below), whose sum is σ = 69502048560. Its totient is φ = 11914636608.

The previous prime is 31441402519. The next prime is 31441402541. The reversal of 31441402540 is 4520414413.

It is a junction number, because it is equal to n+sod(n) for n = 31441402499 and 31441402508.

It is not an unprimeable number, because it can be changed into a prime (31441402541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41369887 + ... + 41370646.

It is an arithmetic number, because the mean of its divisors is an integer number (2895918690).

Almost surely, 2^31441402540 is an apocalyptic number.

It is an amenable number.

31441402540 is an abundant number, since it is smaller than the sum of its proper divisors (38060646020).

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

31441402540 is a wasteful number, since it uses less digits than its factorization.

31441402540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82740561 (or 82740559 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

Adding to 31441402540 its reverse (4520414413), we get a palindrome (35961816953).

The spelling of 31441402540 in words is "thirty-one billion, four hundred forty-one million, four hundred two thousand, five hundred forty".