250972221 has 16 divisors (see below), whose sum is σ = 345020544. Its totient is φ = 162154944.

The previous prime is 250972217. The next prime is 250972223. The reversal of 250972221 is 122279052.

It is not a de Polignac number, because 250972221 - 2² = 250972217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (250972223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24895 + ... + 33491.

It is an arithmetic number, because the mean of its divisors is an integer number (21563784).

Almost surely, 2^250972221 is an apocalyptic number.

It is an amenable number.

250972221 is a deficient number, since it is larger than the sum of its proper divisors (94048323).

250972221 is a wasteful number, since it uses less digits than its factorization.

250972221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8900.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 250972221 is about 15842.1027960306. The cubic root of 250972221 is about 630.7760831243.

The spelling of 250972221 in words is "two hundred fifty million, nine hundred seventy-two thousand, two hundred twenty-one".