280351 has 2 divisors, whose sum is σ = 280352. Its totient is φ = 280350.

The previous prime is 280339. The next prime is 280373. The reversal of 280351 is 153082.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 280351 - 2⁷ = 280223 is a prime.

It is equal to p₂₄₄₆₃ and since 280351 and 24463 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (280321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140175 + 140176.

It is an arithmetic number, because the mean of its divisors is an integer number (140176).

2²⁸⁰³⁵¹ is an apocalyptic number.

280351 is a deficient number, since it is larger than the sum of its proper divisors (1).

280351 is an equidigital number, since it uses as much as digits as its factorization.

280351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 280351 is about 529.4818221620. The cubic root of 280351 is about 65.4486515573.

The spelling of 280351 in words is "two hundred eighty thousand, three hundred fifty-one".