280238501 has 2 divisors, whose sum is σ = 280238502. Its totient is φ = 280238500.

The previous prime is 280238479. The next prime is 280238527. The reversal of 280238501 is 105832082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 163814401 + 116424100 = 12799^2 + 10790^2 .

It is a cyclic number.

It is not a de Polignac number, because 280238501 - 2⁶ = 280238437 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280238561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140119250 + 140119251.

It is an arithmetic number, because the mean of its divisors is an integer number (140119251).

Almost surely, 2^280238501 is an apocalyptic number.

It is an amenable number.

280238501 is a deficient number, since it is larger than the sum of its proper divisors (1).

280238501 is an equidigital number, since it uses as much as digits as its factorization.

280238501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 280238501 is about 16740.3255942051. The cubic root of 280238501 is about 654.3989599383.

The spelling of 280238501 in words is "two hundred eighty million, two hundred thirty-eight thousand, five hundred one".