250640135 has 4 divisors (see below), whose sum is σ = 300768168. Its totient is φ = 200512104.

The previous prime is 250640123. The next prime is 250640161. The reversal of 250640135 is 531046052.

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

It is a cyclic number.

It is not a de Polignac number, because 250640135 - 2⁴ = 250640119 is a prime.

It is a super-3 number, since 3×250640135³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25064009 + ... + 25064018.

It is an arithmetic number, because the mean of its divisors is an integer number (75192042).

Almost surely, 2^250640135 is an apocalyptic number.

250640135 is a deficient number, since it is larger than the sum of its proper divisors (50128033).

250640135 is an equidigital number, since it uses as much as digits as its factorization.

250640135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50128032.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 250640135 is about 15831.6182053510. The cubic root of 250640135 is about 630.4977463899.

Adding to 250640135 its reverse (531046052), we get a palindrome (781686187).

The spelling of 250640135 in words is "two hundred fifty million, six hundred forty thousand, one hundred thirty-five".