281900469249 has 81 divisors (see below), whose sum is σ = 479798833059. Its totient is φ = 159028047360.

The previous prime is 281900469229. The next prime is 281900469251. The reversal of 281900469249 is 942964009182.

The square root of 281900469249 is 530943.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 68301209025 + 213599260224 = 261345^2 + 462168^2 .

It is not a de Polignac number, because 281900469249 - 2¹⁵ = 281900436481 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 281900469195 and 281900469204.

It is not an unprimeable number, because it can be changed into a prime (281900469229) by changing a digit.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 1460624097 + ... + 1460624289.

Almost surely, 2^281900469249 is an apocalyptic number.

281900469249 is the 530943-rd square number.

281900469249 is the 265472-nd centered octagonal number.

It is an amenable number.

281900469249 is a deficient number, since it is larger than the sum of its proper divisors (197898363810).

281900469249 is an equidigital number, since it uses as much as digits as its factorization.

281900469249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 334 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The spelling of 281900469249 in words is "two hundred eighty-one billion, nine hundred million, four hundred sixty-nine thousand, two hundred forty-nine".