31401052500 has 240 divisors, whose sum is σ = 94154860800. Its totient is φ = 8138688000.

The previous prime is 31401052493. The next prime is 31401052541. The reversal of 31401052500 is 525010413.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 80722306 + ... + 80722694.

It is an arithmetic number, because the mean of its divisors is an integer number (392311920).

Almost surely, 2^31401052500 is an apocalyptic number.

31401052500 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31401052500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47077430400).

31401052500 is an abundant number, since it is smaller than the sum of its proper divisors (62753808300).

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

31401052500 is a wasteful number, since it uses less digits than its factorization.

31401052500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692 (or 675 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

Adding to 31401052500 its reverse (525010413), we get a palindrome (31926062913).

The spelling of 31401052500 in words is "thirty-one billion, four hundred one million, fifty-two thousand, five hundred".