280238231 has 16 divisors (see below), whose sum is σ = 345301824. Its totient is φ = 221474304.

The previous prime is 280238131. The next prime is 280238291. The reversal of 280238231 is 132832082.

It is a cyclic number.

It is not a de Polignac number, because 280238231 - 2¹⁰ = 280237207 is a prime.

It is a super-2 number, since 2×280238231² = 157066932228018722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 280238194 and 280238203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280238291) 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, 156815 + ... + 158591.

It is an arithmetic number, because the mean of its divisors is an integer number (21581364).

Almost surely, 2^280238231 is an apocalyptic number.

280238231 is a deficient number, since it is larger than the sum of its proper divisors (65063593).

280238231 is a wasteful number, since it uses less digits than its factorization.

280238231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3530.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 280238231 is about 16740.3175298439. The cubic root of 280238231 is about 654.3987497747.

The spelling of 280238231 in words is "two hundred eighty million, two hundred thirty-eight thousand, two hundred thirty-one".