281072225 has 24 divisors (see below), whose sum is σ = 419288640. Its totient is φ = 182589120.

The previous prime is 281072221. The next prime is 281072249. The reversal of 281072225 is 522270182.

It is not a de Polignac number, because 281072225 - 2² = 281072221 is a prime.

It is not an unprimeable number, because it can be changed into a prime (281072221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38942 + ... + 45591.

It is an arithmetic number, because the mean of its divisors is an integer number (17470360).

Almost surely, 2^281072225 is an apocalyptic number.

281072225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

281072225 is a deficient number, since it is larger than the sum of its proper divisors (138216415).

281072225 is a wasteful number, since it uses less digits than its factorization.

281072225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84569 (or 84564 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 281072225 is about 16765.2087669674. The cubic root of 281072225 is about 655.0472743301.

The spelling of 281072225 in words is "two hundred eighty-one million, seventy-two thousand, two hundred twenty-five".