213855883729 has 2 divisors, whose sum is σ = 213855883730. Its totient is φ = 213855883728.

The previous prime is 213855883711. The next prime is 213855883741. The reversal of 213855883729 is 927388558312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204803312704 + 9052571025 = 452552^2 + 95145^2 .

It is a cyclic number.

It is not a de Polignac number, because 213855883729 - 2¹³ = 213855875537 is a prime.

It is not a weakly prime, because it can be changed into another prime (213855883529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106927941864 + 106927941865.

It is an arithmetic number, because the mean of its divisors is an integer number (106927941865).

Almost surely, 2^213855883729 is an apocalyptic number.

It is an amenable number.

213855883729 is a deficient number, since it is larger than the sum of its proper divisors (1).

213855883729 is an equidigital number, since it uses as much as digits as its factorization.

213855883729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29030400, while the sum is 61.

The spelling of 213855883729 in words is "two hundred thirteen billion, eight hundred fifty-five million, eight hundred eighty-three thousand, seven hundred twenty-nine".