281523252 has 12 divisors (see below), whose sum is σ = 656887616. Its totient is φ = 93841080.

The previous prime is 281523251. The next prime is 281523257. The reversal of 281523252 is 252325182.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×281523252³ (a number of 26 digits) contains 333 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281523251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11730124 + ... + 11730147.

Almost surely, 2^281523252 is an apocalyptic number.

It is an amenable number.

281523252 is an abundant number, since it is smaller than the sum of its proper divisors (375364364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

281523252 is a wasteful number, since it uses less digits than its factorization.

281523252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23460278 (or 23460276 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 281523252 is about 16778.6546540538. The cubic root of 281523252 is about 655.3974644139.

The spelling of 281523252 in words is "two hundred eighty-one million, five hundred twenty-three thousand, two hundred fifty-two".