31433213297 has 2 divisors, whose sum is σ = 31433213298. Its totient is φ = 31433213296.

The previous prime is 31433213291. The next prime is 31433213347. The reversal of 31433213297 is 79231233413.

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., 31339974961 + 93238336 = 177031^2 + 9656^2 .

It is a cyclic number.

It is not a de Polignac number, because 31433213297 - 2¹² = 31433209201 is a prime.

It is a super-2 number, since 2×31433213297² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31433213297.

It is not a weakly prime, because it can be changed into another prime (31433213291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15716606648 + 15716606649.

It is an arithmetic number, because the mean of its divisors is an integer number (15716606649).

Almost surely, 2^31433213297 is an apocalyptic number.

It is an amenable number.

31433213297 is a deficient number, since it is larger than the sum of its proper divisors (1).

31433213297 is an equidigital number, since it uses as much as digits as its factorization.

31433213297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 38.

The spelling of 31433213297 in words is "thirty-one billion, four hundred thirty-three million, two hundred thirteen thousand, two hundred ninety-seven".