31401121340 has 24 divisors (see below), whose sum is σ = 65977565472. Its totient is φ = 12553741760.

The previous prime is 31401121309. The next prime is 31401121363. The reversal of 31401121340 is 4312110413.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 380696 + ... + 455775.

It is an arithmetic number, because the mean of its divisors is an integer number (2749065228).

Almost surely, 2^31401121340 is an apocalyptic number.

It is an amenable number.

31401121340 is an abundant number, since it is smaller than the sum of its proper divisors (34576444132).

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

31401121340 is a wasteful number, since it uses less digits than its factorization.

31401121340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838357 (or 838355 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 31401121340 its reverse (4312110413), we get a palindrome (35713231753).

The spelling of 31401121340 in words is "thirty-one billion, four hundred one million, one hundred twenty-one thousand, three hundred forty".