31542530189 has 2 divisors, whose sum is σ = 31542530190. Its totient is φ = 31542530188.

The previous prime is 31542530177. The next prime is 31542530191. The reversal of 31542530189 is 98103524513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28651317289 + 2891212900 = 169267^2 + 53770^2 .

It is a cyclic number.

It is not a de Polignac number, because 31542530189 - 2³² = 27247562893 is a prime.

Together with 31542530191, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31542530389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15771265094 + 15771265095.

It is an arithmetic number, because the mean of its divisors is an integer number (15771265095).

Almost surely, 2^31542530189 is an apocalyptic number.

It is an amenable number.

31542530189 is a deficient number, since it is larger than the sum of its proper divisors (1).

31542530189 is an equidigital number, since it uses as much as digits as its factorization.

31542530189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 31542530189 in words is "thirty-one billion, five hundred forty-two million, five hundred thirty thousand, one hundred eighty-nine".