250220661 has 4 divisors (see below), whose sum is σ = 333627552. Its totient is φ = 166813772.

The previous prime is 250220653. The next prime is 250220669. The reversal of 250220661 is 166022052.

250220661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (250220653) and next prime (250220669).

It is a cyclic number.

It is not a de Polignac number, because 250220661 - 2³ = 250220653 is a prime.

It is a super-2 number, since 2×250220661² = 125220758382553842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (250220669) 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, 41703441 + ... + 41703446.

It is an arithmetic number, because the mean of its divisors is an integer number (83406888).

Almost surely, 2^250220661 is an apocalyptic number.

It is an amenable number.

250220661 is a deficient number, since it is larger than the sum of its proper divisors (83406891).

250220661 is an equidigital number, since it uses as much as digits as its factorization.

250220661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83406890.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 250220661 is about 15818.3646752754. The cubic root of 250220661 is about 630.1458140692.

The spelling of 250220661 in words is "two hundred fifty million, two hundred twenty thousand, six hundred sixty-one".