251082270221 has 4 divisors (see below), whose sum is σ = 251141450112. Its totient is φ = 251023090332.

The previous prime is 251082270199. The next prime is 251082270233. The reversal of 251082270221 is 122072280152.

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 251082270221 - 2³⁰ = 250008528397 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 (251082270421) 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, 29583581 + ... + 29592066.

It is an arithmetic number, because the mean of its divisors is an integer number (62785362528).

Almost surely, 2^251082270221 is an apocalyptic number.

It is an amenable number.

251082270221 is a deficient number, since it is larger than the sum of its proper divisors (59179891).

251082270221 is an equidigital number, since it uses as much as digits as its factorization.

251082270221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59179890.

The product of its (nonzero) digits is 8960, while the sum is 32.

The spelling of 251082270221 in words is "two hundred fifty-one billion, eighty-two million, two hundred seventy thousand, two hundred twenty-one".