31725342403993 has 16 divisors (see below), whose sum is σ = 36282131297280. Its totient is φ = 27174707569296.

The previous prime is 31725342403987. The next prime is 31725342404003. The reversal of 31725342403993 is 39930424352713.

It is a happy number.

It is not a de Polignac number, because 31725342403993 - 2³³ = 31716752469401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31725342403193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81080380 + ... + 81470722.

It is an arithmetic number, because the mean of its divisors is an integer number (2267633206080).

Almost surely, 2^{31725342403993} is an apocalyptic number.

It is an amenable number.

31725342403993 is a deficient number, since it is larger than the sum of its proper divisors (4556788893287).

31725342403993 is a wasteful number, since it uses less digits than its factorization.

31725342403993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398196.

The product of its (nonzero) digits is 14696640, while the sum is 55.

The spelling of 31725342403993 in words is "thirty-one trillion, seven hundred twenty-five billion, three hundred forty-two million, four hundred three thousand, nine hundred ninety-three".