213854257 has 4 divisors (see below), whose sum is σ = 213900660. Its totient is φ = 213807856.

The previous prime is 213854233. The next prime is 213854281. The reversal of 213854257 is 752458312.

213854257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (213854233) and next prime (213854281).

It can be written as a sum of positive squares in 2 ways, for example, as 200958976 + 12895281 = 14176^2 + 3591^2 .

It is a cyclic number.

It is not a de Polignac number, because 213854257 - 2⁷ = 213854129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213854297) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15418 + ... + 25795.

It is an arithmetic number, because the mean of its divisors is an integer number (53475165).

Almost surely, 2^213854257 is an apocalyptic number.

It is an amenable number.

213854257 is a deficient number, since it is larger than the sum of its proper divisors (46403).

213854257 is an equidigital number, since it uses as much as digits as its factorization.

213854257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46402.

The product of its digits is 67200, while the sum is 37.

The square root of 213854257 is about 14623.7565967162. The cubic root of 213854257 is about 598.0065854243.

The spelling of 213854257 in words is "two hundred thirteen million, eight hundred fifty-four thousand, two hundred fifty-seven".