280072251 has 12 divisors (see below), whose sum is σ = 407503512. Its totient is φ = 185351136.

The previous prime is 280072249. The next prime is 280072307. The reversal of 280072251 is 152270082.

It is not a de Polignac number, because 280072251 - 2¹ = 280072249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (280072451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 112341 + ... + 114806.

It is an arithmetic number, because the mean of its divisors is an integer number (33958626).

Almost surely, 2^280072251 is an apocalyptic number.

280072251 is a deficient number, since it is larger than the sum of its proper divisors (127431261).

280072251 is a wasteful number, since it uses less digits than its factorization.

280072251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227290 (or 227287 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 280072251 is about 16735.3593029848. The cubic root of 280072251 is about 654.2695281060.

The spelling of 280072251 in words is "two hundred eighty million, seventy-two thousand, two hundred fifty-one".