250220639 has 2 divisors, whose sum is σ = 250220640. Its totient is φ = 250220638.

The previous prime is 250220627. The next prime is 250220647. The reversal of 250220639 is 936022052.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-250220639 is a prime.

It is a super-2 number, since 2×250220639² = 125220736363136642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250220669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125110319 + 125110320.

It is an arithmetic number, because the mean of its divisors is an integer number (125110320).

Almost surely, 2^250220639 is an apocalyptic number.

250220639 is a deficient number, since it is larger than the sum of its proper divisors (1).

250220639 is an equidigital number, since it uses as much as digits as its factorization.

250220639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 250220639 is about 15818.3639798811. The cubic root of 250220639 is about 630.1457956012.

The spelling of 250220639 in words is "two hundred fifty million, two hundred twenty thousand, six hundred thirty-nine".