281313625 has 8 divisors (see below), whose sum is σ = 351079560. Its totient is φ = 225050800.

The previous prime is 281313619. The next prime is 281313649. The reversal of 281313625 is 526313182.

It can be written as a sum of positive squares in 4 ways, for example, as 28217344 + 253096281 = 5312^2 + 15909^2 .

It is not a de Polignac number, because 281313625 - 2¹⁷ = 281182553 is a prime.

It is a super-2 number, since 2×281313625² = 158274711221281250, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1125130 + ... + 1125379.

It is an arithmetic number, because the mean of its divisors is an integer number (43884945).

Almost surely, 2^281313625 is an apocalyptic number.

281313625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

281313625 is a deficient number, since it is larger than the sum of its proper divisors (69765935).

281313625 is an equidigital number, since it uses as much as digits as its factorization.

281313625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2250524 (or 2250514 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 281313625 is about 16772.4066549795. The cubic root of 281313625 is about 655.2347506556.

The spelling of 281313625 in words is "two hundred eighty-one million, three hundred thirteen thousand, six hundred twenty-five".