31355345507 has 2 divisors, whose sum is σ = 31355345508. Its totient is φ = 31355345506.

The previous prime is 31355345347. The next prime is 31355345531. The reversal of 31355345507 is 70554355313.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31355345507 - 2¹⁴ = 31355329123 is a prime.

It is not a weakly prime, because it can be changed into another prime (31355345537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15677672753 + 15677672754.

It is an arithmetic number, because the mean of its divisors is an integer number (15677672754).

Almost surely, 2^31355345507 is an apocalyptic number.

31355345507 is a deficient number, since it is larger than the sum of its proper divisors (1).

31355345507 is an equidigital number, since it uses as much as digits as its factorization.

31355345507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 472500, while the sum is 41.

The spelling of 31355345507 in words is "thirty-one billion, three hundred fifty-five million, three hundred forty-five thousand, five hundred seven".