31339541 has 2 divisors, whose sum is σ = 31339542. Its totient is φ = 31339540.

The previous prime is 31339519. The next prime is 31339549. The reversal of 31339541 is 14593313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30580900 + 758641 = 5530^2 + 871^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31339541 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31339549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15669770 + 15669771.

It is an arithmetic number, because the mean of its divisors is an integer number (15669771).

Almost surely, 2^31339541 is an apocalyptic number.

It is an amenable number.

31339541 is a deficient number, since it is larger than the sum of its proper divisors (1).

31339541 is an equidigital number, since it uses as much as digits as its factorization.

31339541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 29.

The square root of 31339541 is about 5598.1730055439. The cubic root of 31339541 is about 315.2808145064.

The spelling of 31339541 in words is "thirty-one million, three hundred thirty-nine thousand, five hundred forty-one".