225739280 has 40 divisors (see below), whose sum is σ = 565219032. Its totient is φ = 83349504.

The previous prime is 225739279. The next prime is 225739307. The reversal of 225739280 is 82937522.

It can be written as a sum of positive squares in 4 ways, for example, as 7054336 + 218684944 = 2656^2 + 14788^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 107489 + ... + 109568.

Almost surely, 2^225739280 is an apocalyptic number.

225739280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225739280 is an abundant number, since it is smaller than the sum of its proper divisors (339479752).

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

225739280 is a wasteful number, since it uses less digits than its factorization.

225739280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217083 (or 217077 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 225739280 is about 15024.6224578190. The cubic root of 225739280 is about 608.8856120930.

The spelling of 225739280 in words is "two hundred twenty-five million, seven hundred thirty-nine thousand, two hundred eighty".