31725141440 has 56 divisors (see below), whose sum is σ = 75561059952. Its totient is φ = 12687441920.

The previous prime is 31725141421. The next prime is 31725141449. The reversal of 31725141440 is 4414152713.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 31725141397 and 31725141406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31725141449) 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, 2533595 + ... + 2546085.

It is an arithmetic number, because the mean of its divisors is an integer number (1349304642).

Almost surely, 2^31725141440 is an apocalyptic number.

It is an amenable number.

31725141440 is an abundant number, since it is smaller than the sum of its proper divisors (43835918512).

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

31725141440 is a wasteful number, since it uses less digits than its factorization.

31725141440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20445 (or 20435 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The spelling of 31725141440 in words is "thirty-one billion, seven hundred twenty-five million, one hundred forty-one thousand, four hundred forty".