280305030253 has 4 divisors (see below), whose sum is σ = 280729092988. Its totient is φ = 279880967520.

The previous prime is 280305030233. The next prime is 280305030259. The reversal of 280305030253 is 352030503082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 352030503082 = 2 ⋅176015251541.

It can be written as a sum of positive squares in 2 ways, for example, as 222041691369 + 58263338884 = 471213^2 + 241378^2 .

It is a cyclic number.

It is not a de Polignac number, because 280305030253 - 2³³ = 271715095661 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 (280305030259) 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 3 ways as a sum of consecutive naturals, for example, 212030376 + ... + 212031697.

It is an arithmetic number, because the mean of its divisors is an integer number (70182273247).

Almost surely, 2^280305030253 is an apocalyptic number.

It is an amenable number.

280305030253 is a deficient number, since it is larger than the sum of its proper divisors (424062735).

280305030253 is an equidigital number, since it uses as much as digits as its factorization.

280305030253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424062734.

The product of its (nonzero) digits is 21600, while the sum is 31.

The spelling of 280305030253 in words is "two hundred eighty billion, three hundred five million, thirty thousand, two hundred fifty-three".