40312212313397 has 2 divisors, whose sum is σ = 40312212313398. Its totient is φ = 40312212313396.

The previous prime is 40312212313379. The next prime is 40312212313421. The reversal of 40312212313397 is 79331321221304.

Together with previous prime (40312212313379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33151696578001 + 7160515735396 = 5757751^2 + 2675914^2 .

It is a cyclic number.

It is not a de Polignac number, because 40312212313397 - 2³⁴ = 40295032444213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40312212313327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20156106156698 + 20156106156699.

It is an arithmetic number, because the mean of its divisors is an integer number (20156106156699).

Almost surely, 2^{40312212313397} is an apocalyptic number.

It is an amenable number.

40312212313397 is a deficient number, since it is larger than the sum of its proper divisors (1).

40312212313397 is an equidigital number, since it uses as much as digits as its factorization.

40312212313397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 41.

The spelling of 40312212313397 in words is "forty trillion, three hundred twelve billion, two hundred twelve million, three hundred thirteen thousand, three hundred ninety-seven".