213531085739 has 2 divisors, whose sum is σ = 213531085740. Its totient is φ = 213531085738.

The previous prime is 213531085721. The next prime is 213531085763. The reversal of 213531085739 is 937580135312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213531085739 - 2²⁰ = 213530037163 is a prime.

It is a super-2 number, since 2×213531085739² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 213531085693 and 213531085702.

It is not a weakly prime, because it can be changed into another prime (213531015739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106765542869 + 106765542870.

It is an arithmetic number, because the mean of its divisors is an integer number (106765542870).

Almost surely, 2^213531085739 is an apocalyptic number.

213531085739 is a deficient number, since it is larger than the sum of its proper divisors (1).

213531085739 is an equidigital number, since it uses as much as digits as its factorization.

213531085739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 47.

The spelling of 213531085739 in words is "two hundred thirteen billion, five hundred thirty-one million, eighty-five thousand, seven hundred thirty-nine".