213432030257 has 2 divisors, whose sum is σ = 213432030258. Its totient is φ = 213432030256.

The previous prime is 213432030187. The next prime is 213432030263. The reversal of 213432030257 is 752030234312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165694587136 + 47737443121 = 407056^2 + 218489^2 .

It is a cyclic number.

It is not a de Polignac number, because 213432030257 - 2¹⁶ = 213431964721 is a prime.

It is not a weakly prime, because it can be changed into another prime (213432030557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106716015128 + 106716015129.

It is an arithmetic number, because the mean of its divisors is an integer number (106716015129).

Almost surely, 2^213432030257 is an apocalyptic number.

It is an amenable number.

213432030257 is a deficient number, since it is larger than the sum of its proper divisors (1).

213432030257 is an equidigital number, since it uses as much as digits as its factorization.

213432030257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 32.

Adding to 213432030257 its reverse (752030234312), we get a palindrome (965462264569).

The spelling of 213432030257 in words is "two hundred thirteen billion, four hundred thirty-two million, thirty thousand, two hundred fifty-seven".