250740770221 has 4 divisors (see below), whose sum is σ = 251459225500. Its totient is φ = 250022314944.

The previous prime is 250740770209. The next prime is 250740770281. The reversal of 250740770221 is 122077047052.

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

It can be written as a sum of positive squares in 2 ways, for example, as 200480062500 + 50260707721 = 447750^2 + 224189^2 .

It is a cyclic number.

It is not a de Polignac number, because 250740770221 - 2¹⁵ = 250740737453 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 (250740770281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359227116 + ... + 359227813.

It is an arithmetic number, because the mean of its divisors is an integer number (62864806375).

Almost surely, 2^250740770221 is an apocalyptic number.

It is an amenable number.

250740770221 is a deficient number, since it is larger than the sum of its proper divisors (718455279).

250740770221 is an equidigital number, since it uses as much as digits as its factorization.

250740770221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718455278.

The product of its (nonzero) digits is 54880, while the sum is 37.

The spelling of 250740770221 in words is "two hundred fifty billion, seven hundred forty million, seven hundred seventy thousand, two hundred twenty-one".