31475311229 has 2 divisors, whose sum is σ = 31475311230. Its totient is φ = 31475311228.

The previous prime is 31475311187. The next prime is 31475311267. The reversal of 31475311229 is 92211357413.

It is an a-pointer prime, because the next prime (31475311267) can be obtained adding 31475311229 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23112208729 + 8363102500 = 152027^2 + 91450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31475311229 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31475311192 and 31475311201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31475313229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15737655614 + 15737655615.

It is an arithmetic number, because the mean of its divisors is an integer number (15737655615).

Almost surely, 2^31475311229 is an apocalyptic number.

It is an amenable number.

31475311229 is a deficient number, since it is larger than the sum of its proper divisors (1).

31475311229 is an equidigital number, since it uses as much as digits as its factorization.

31475311229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 38.

The spelling of 31475311229 in words is "thirty-one billion, four hundred seventy-five million, three hundred eleven thousand, two hundred twenty-nine".