213875257 has 2 divisors, whose sum is σ = 213875258. Its totient is φ = 213875256.

The previous prime is 213875161. The next prime is 213875273. The reversal of 213875257 is 752578312.

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., 189035001 + 24840256 = 13749^2 + 4984^2 .

It is a cyclic number.

It is not a de Polignac number, because 213875257 - 2²³ = 205486649 is a prime.

It is not a weakly prime, because it can be changed into another prime (213878257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106937628 + 106937629.

It is an arithmetic number, because the mean of its divisors is an integer number (106937629).

Almost surely, 2^213875257 is an apocalyptic number.

It is an amenable number.

213875257 is a deficient number, since it is larger than the sum of its proper divisors (1).

213875257 is an equidigital number, since it uses as much as digits as its factorization.

213875257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 117600, while the sum is 40.

The square root of 213875257 is about 14624.4745888528. The cubic root of 213875257 is about 598.0261590776.

The spelling of 213875257 in words is "two hundred thirteen million, eight hundred seventy-five thousand, two hundred fifty-seven".