280361231 has 4 divisors (see below), whose sum is σ = 282243000. Its totient is φ = 278479464.

The previous prime is 280361219. The next prime is 280361233. The reversal of 280361231 is 132163082.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 280361231 - 2¹⁰ = 280360207 is a prime.

It is a super-2 number, since 2×280361231² = 157204839695670722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 280361231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280361233) 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, 940661 + ... + 940958.

It is an arithmetic number, because the mean of its divisors is an integer number (70560750).

Almost surely, 2^280361231 is an apocalyptic number.

280361231 is a deficient number, since it is larger than the sum of its proper divisors (1881769).

280361231 is a wasteful number, since it uses less digits than its factorization.

280361231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881768.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 280361231 is about 16743.9908922574. The cubic root of 280361231 is about 654.4944769858.

The spelling of 280361231 in words is "two hundred eighty million, three hundred sixty-one thousand, two hundred thirty-one".