280911223 has 2 divisors, whose sum is σ = 280911224. Its totient is φ = 280911222.

The previous prime is 280911221. The next prime is 280911251. The reversal of 280911223 is 322119082.

It is an a-pointer prime, because the next prime (280911251) can be obtained adding 280911223 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 280911223 - 2¹ = 280911221 is a prime.

It is a super-2 number, since 2×280911223² = 157822230414711458, which contains 22 as substring.

Together with 280911221, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 280911191 and 280911200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280911221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140455611 + 140455612.

It is an arithmetic number, because the mean of its divisors is an integer number (140455612).

Almost surely, 2^280911223 is an apocalyptic number.

280911223 is a deficient number, since it is larger than the sum of its proper divisors (1).

280911223 is an equidigital number, since it uses as much as digits as its factorization.

280911223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 280911223 is about 16760.4064091537. The cubic root of 280911223 is about 654.9221771067.

The spelling of 280911223 in words is "two hundred eighty million, nine hundred eleven thousand, two hundred twenty-three".