31542301243 has 2 divisors, whose sum is σ = 31542301244. Its totient is φ = 31542301242.

The previous prime is 31542301237. The next prime is 31542301247. The reversal of 31542301243 is 34210324513.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31542301243 - 2⁹ = 31542300731 is a prime.

It is not a weakly prime, because it can be changed into another prime (31542301247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15771150621 + 15771150622.

It is an arithmetic number, because the mean of its divisors is an integer number (15771150622).

Almost surely, 2^31542301243 is an apocalyptic number.

31542301243 is a deficient number, since it is larger than the sum of its proper divisors (1).

31542301243 is an equidigital number, since it uses as much as digits as its factorization.

31542301243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 31542301243 its reverse (34210324513), we get a palindrome (65752625756).

The spelling of 31542301243 in words is "thirty-one billion, five hundred forty-two million, three hundred one thousand, two hundred forty-three".