31434354157 has 2 divisors, whose sum is σ = 31434354158. Its totient is φ = 31434354156.

The previous prime is 31434354079. The next prime is 31434354257. The reversal of 31434354157 is 75145343413.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16565234436 + 14869119721 = 128706^2 + 121939^2 .

It is a cyclic number.

It is not a de Polignac number, because 31434354157 - 2¹⁵ = 31434321389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31434354257) 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, 15717177078 + 15717177079.

It is an arithmetic number, because the mean of its divisors is an integer number (15717177079).

Almost surely, 2^31434354157 is an apocalyptic number.

It is an amenable number.

31434354157 is a deficient number, since it is larger than the sum of its proper divisors (1).

31434354157 is an equidigital number, since it uses as much as digits as its factorization.

31434354157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 302400, while the sum is 40.

The spelling of 31434354157 in words is "thirty-one billion, four hundred thirty-four million, three hundred fifty-four thousand, one hundred fifty-seven".