31405727245 has 8 divisors (see below), whose sum is σ = 37961960184. Its totient is φ = 24941190144.

The previous prime is 31405727231. The next prime is 31405727279. The reversal of 31405727245 is 54272750413.

It can be written as a sum of positive squares in 4 ways, for example, as 3579150276 + 27826576969 = 59826^2 + 166813^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31405727245 - 2⁹ = 31405726733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31405727198 and 31405727207.

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, 22923204 + ... + 22924573.

It is an arithmetic number, because the mean of its divisors is an integer number (4745245023).

Almost surely, 2^31405727245 is an apocalyptic number.

It is an amenable number.

31405727245 is a deficient number, since it is larger than the sum of its proper divisors (6556232939).

31405727245 is a wasteful number, since it uses less digits than its factorization.

31405727245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45847919.

The product of its (nonzero) digits is 235200, while the sum is 40.

The spelling of 31405727245 in words is "thirty-one billion, four hundred five million, seven hundred twenty-seven thousand, two hundred forty-five".