283221225 has 72 divisors (see below), whose sum is σ = 605303520. Its totient is φ = 129457440.

The previous prime is 283221217. The next prime is 283221233. The reversal of 283221225 is 522122382.

It is an interprime number because it is at equal distance from previous prime (283221217) and next prime (283221233).

It is not a de Polignac number, because 283221225 - 2³ = 283221217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 28794 + ... + 37356.

Almost surely, 2^283221225 is an apocalyptic number.

283221225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

283221225 is an abundant number, since it is smaller than the sum of its proper divisors (322082295).

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

283221225 is a wasteful number, since it uses less digits than its factorization.

283221225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8596 (or 8578 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 283221225 is about 16829.1777874024. The cubic root of 283221225 is about 656.7124740077.

The spelling of 283221225 in words is "two hundred eighty-three million, two hundred twenty-one thousand, two hundred twenty-five".