213134644451 has 2 divisors, whose sum is σ = 213134644452. Its totient is φ = 213134644450.

The previous prime is 213134644423. The next prime is 213134644453. The reversal of 213134644451 is 154446431312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213134644451 - 2¹⁴ = 213134628067 is a prime.

Together with 213134644453, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (213134644453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106567322225 + 106567322226.

It is an arithmetic number, because the mean of its divisors is an integer number (106567322226).

Almost surely, 2^213134644451 is an apocalyptic number.

213134644451 is a deficient number, since it is larger than the sum of its proper divisors (1).

213134644451 is an equidigital number, since it uses as much as digits as its factorization.

213134644451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 38.

The spelling of 213134644451 in words is "two hundred thirteen billion, one hundred thirty-four million, six hundred forty-four thousand, four hundred fifty-one".