31395841 has 2 divisors, whose sum is σ = 31395842. Its totient is φ = 31395840.

The previous prime is 31395823. The next prime is 31395857. The reversal of 31395841 is 14859313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25000000 + 6395841 = 5000^2 + 2529^2 .

It is a cyclic number.

It is not a de Polignac number, because 31395841 - 2¹³ = 31387649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31395797 and 31395806.

It is not a weakly prime, because it can be changed into another prime (31395041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15697920 + 15697921.

It is an arithmetic number, because the mean of its divisors is an integer number (15697921).

Almost surely, 2^31395841 is an apocalyptic number.

It is an amenable number.

31395841 is a deficient number, since it is larger than the sum of its proper divisors (1).

31395841 is an equidigital number, since it uses as much as digits as its factorization.

31395841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 34.

The square root of 31395841 is about 5603.1991754711. The cubic root of 31395841 is about 315.4694972449.

The spelling of 31395841 in words is "thirty-one million, three hundred ninety-five thousand, eight hundred forty-one".