213423432757 has 2 divisors, whose sum is σ = 213423432758. Its totient is φ = 213423432756.

The previous prime is 213423432749. The next prime is 213423432773. The reversal of 213423432757 is 757234324312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 160994340081 + 52429092676 = 401241^2 + 228974^2 .

It is a cyclic number.

It is not a de Polignac number, because 213423432757 - 2³ = 213423432749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213423432727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106711716378 + 106711716379.

It is an arithmetic number, because the mean of its divisors is an integer number (106711716379).

Almost surely, 2^213423432757 is an apocalyptic number.

It is an amenable number.

213423432757 is a deficient number, since it is larger than the sum of its proper divisors (1).

213423432757 is an equidigital number, since it uses as much as digits as its factorization.

213423432757 is an evil number, because the sum of its binary digits is even.

The product of its digits is 846720, while the sum is 43.

The spelling of 213423432757 in words is "two hundred thirteen billion, four hundred twenty-three million, four hundred thirty-two thousand, seven hundred fifty-seven".