280213247 has 8 divisors (see below), whose sum is σ = 297071232. Its totient is φ = 263844000.

The previous prime is 280213231. The next prime is 280213249. The reversal of 280213247 is 742312082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 280213247 - 2⁴ = 280213231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (280213249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121004 + ... + 123297.

It is an arithmetic number, because the mean of its divisors is an integer number (37133904).

Almost surely, 2^280213247 is an apocalyptic number.

280213247 is a deficient number, since it is larger than the sum of its proper divisors (16857985).

280213247 is a wasteful number, since it uses less digits than its factorization.

280213247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244369.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 280213247 is about 16739.5712908067. The cubic root of 280213247 is about 654.3793020543.

The spelling of 280213247 in words is "two hundred eighty million, two hundred thirteen thousand, two hundred forty-seven".