31421040001400 has 96 divisors (see below), whose sum is σ = 83522399953440. Its totient is φ = 10768772136960.

The previous prime is 31421040001349. The next prime is 31421040001409. The reversal of 31421040001400 is 410004012413.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421040001409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 697529 + ... + 7957928.

It is an arithmetic number, because the mean of its divisors is an integer number (870024999515).

Almost surely, 2^{31421040001400} 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 31421040001400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41761199976720).

31421040001400 is an abundant number, since it is smaller than the sum of its proper divisors (52101359952040).

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

31421040001400 is a wasteful number, since it uses less digits than its factorization.

31421040001400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8658073 (or 8658064 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 31421040001400 its reverse (410004012413), we get a palindrome (31831044013813).

The spelling of 31421040001400 in words is "thirty-one trillion, four hundred twenty-one billion, forty million, one thousand, four hundred".