250135265221 has 4 divisors (see below), whose sum is σ = 263300279200. Its totient is φ = 236970251244.

The previous prime is 250135265203. The next prime is 250135265243. The reversal of 250135265221 is 122562531052.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 250135265221 - 2¹¹ = 250135263173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (250135265321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6582506961 + ... + 6582506998.

It is an arithmetic number, because the mean of its divisors is an integer number (65825069800).

Almost surely, 2^250135265221 is an apocalyptic number.

It is an amenable number.

250135265221 is a deficient number, since it is larger than the sum of its proper divisors (13165013979).

250135265221 is a wasteful number, since it uses less digits than its factorization.

250135265221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13165013978.

The product of its (nonzero) digits is 36000, while the sum is 34.

Adding to 250135265221 its reverse (122562531052), we get a palindrome (372697796273).

The spelling of 250135265221 in words is "two hundred fifty billion, one hundred thirty-five million, two hundred sixty-five thousand, two hundred twenty-one".