31215034399 has 2 divisors, whose sum is σ = 31215034400. Its totient is φ = 31215034398.

The previous prime is 31215034387. The next prime is 31215034439. The reversal of 31215034399 is 99343051213.

It is a happy number.

It is an a-pointer prime, because the next prime (31215034439) can be obtained adding 31215034399 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31215034399 - 2¹³ = 31215026207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31215034369) 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, 15607517199 + 15607517200.

It is an arithmetic number, because the mean of its divisors is an integer number (15607517200).

Almost surely, 2^31215034399 is an apocalyptic number.

31215034399 is a deficient number, since it is larger than the sum of its proper divisors (1).

31215034399 is an equidigital number, since it uses as much as digits as its factorization.

31215034399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 40.

The spelling of 31215034399 in words is "thirty-one billion, two hundred fifteen million, thirty-four thousand, three hundred ninety-nine".