213929027381 has 2 divisors, whose sum is σ = 213929027382. Its totient is φ = 213929027380.

The previous prime is 213929027369. The next prime is 213929027489. The reversal of 213929027381 is 183720929312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154787164900 + 59141862481 = 393430^2 + 243191^2 .

It is a cyclic number.

It is not a de Polignac number, because 213929027381 - 2³⁴ = 196749158197 is a prime.

It is a super-2 number, since 2×213929027381² (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 (213929927381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106964513690 + 106964513691.

It is an arithmetic number, because the mean of its divisors is an integer number (106964513691).

Almost surely, 2^213929027381 is an apocalyptic number.

It is an amenable number.

213929027381 is a deficient number, since it is larger than the sum of its proper divisors (1).

213929027381 is an equidigital number, since it uses as much as digits as its factorization.

213929027381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592, while the sum is 47.

The spelling of 213929027381 in words is "two hundred thirteen billion, nine hundred twenty-nine million, twenty-seven thousand, three hundred eighty-one".