213586475381 has 2 divisors, whose sum is σ = 213586475382. Its totient is φ = 213586475380.

The previous prime is 213586475357. The next prime is 213586475387. The reversal of 213586475381 is 183574685312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145565140900 + 68021334481 = 381530^2 + 260809^2 .

It is a cyclic number.

It is not a de Polignac number, because 213586475381 - 2¹⁰ = 213586474357 is a prime.

It is a super-2 number, since 2×213586475381² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213586475387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106793237690 + 106793237691.

It is an arithmetic number, because the mean of its divisors is an integer number (106793237691).

Almost surely, 2^213586475381 is an apocalyptic number.

It is an amenable number.

213586475381 is a deficient number, since it is larger than the sum of its proper divisors (1).

213586475381 is an equidigital number, since it uses as much as digits as its factorization.

213586475381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4838400, while the sum is 53.

The spelling of 213586475381 in words is "two hundred thirteen billion, five hundred eighty-six million, four hundred seventy-five thousand, three hundred eighty-one".