31055641 has 2 divisors, whose sum is σ = 31055642. Its totient is φ = 31055640.

The previous prime is 31055621. The next prime is 31055657. The reversal of 31055641 is 14655013.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31036041 + 19600 = 5571^2 + 140^2 .

It is an emirp because it is prime and its reverse (14655013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31055641 - 2⁷ = 31055513 is a prime.

It is not a weakly prime, because it can be changed into another prime (31055621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15527820 + 15527821.

It is an arithmetic number, because the mean of its divisors is an integer number (15527821).

Almost surely, 2^31055641 is an apocalyptic number.

It is an amenable number.

31055641 is a deficient number, since it is larger than the sum of its proper divisors (1).

31055641 is an equidigital number, since it uses as much as digits as its factorization.

31055641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 31055641 is about 5572.7588320328. The cubic root of 31055641 is about 314.3258986694.

The spelling of 31055641 in words is "thirty-one million, fifty-five thousand, six hundred forty-one".