34720213531 has 2 divisors, whose sum is σ = 34720213532. Its totient is φ = 34720213530.

The previous prime is 34720213511. The next prime is 34720213571. The reversal of 34720213531 is 13531202743.

It is a weak prime.

It is an emirp because it is prime and its reverse (13531202743) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34720213531 - 2¹³ = 34720205339 is a prime.

It is a super-2 number, since 2×34720213531² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 34720213493 and 34720213502.

It is not a weakly prime, because it can be changed into another prime (34720213501) 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, 17360106765 + 17360106766.

It is an arithmetic number, because the mean of its divisors is an integer number (17360106766).

Almost surely, 2^34720213531 is an apocalyptic number.

34720213531 is a deficient number, since it is larger than the sum of its proper divisors (1).

34720213531 is an equidigital number, since it uses as much as digits as its factorization.

34720213531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 31.

The spelling of 34720213531 in words is "thirty-four billion, seven hundred twenty million, two hundred thirteen thousand, five hundred thirty-one".