280231075 has 6 divisors (see below), whose sum is σ = 347486564. Its totient is φ = 224184840.

The previous prime is 280231069. The next prime is 280231079. The reversal of 280231075 is 570132082.

It is not a de Polignac number, because 280231075 - 2⁷ = 280230947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (280231079) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5604597 + ... + 5604646.

Almost surely, 2^280231075 is an apocalyptic number.

280231075 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

280231075 is a deficient number, since it is larger than the sum of its proper divisors (67255489).

280231075 is a wasteful number, since it uses less digits than its factorization.

280231075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11209253 (or 11209248 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 280231075 is about 16740.1037929877. The cubic root of 280231075 is about 654.3931796124.

It can be divided in two parts, 280 and 231075, that multiplied together give a triangular number (64701000 = T₁₁₃₇₅).

The spelling of 280231075 in words is "two hundred eighty million, two hundred thirty-one thousand, seventy-five".