225171539 has 4 divisors (see below), whose sum is σ = 225207456. Its totient is φ = 225135624.

The previous prime is 225171517. The next prime is 225171547. The reversal of 225171539 is 935171522.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 225171539 - 2¹² = 225167443 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 225171499 and 225171508.

It is not an unprimeable number, because it can be changed into a prime (225171509) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5819 + ... + 22004.

It is an arithmetic number, because the mean of its divisors is an integer number (56301864).

Almost surely, 2^225171539 is an apocalyptic number.

225171539 is a deficient number, since it is larger than the sum of its proper divisors (35917).

225171539 is an equidigital number, since it uses as much as digits as its factorization.

225171539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35916.

The product of its digits is 18900, while the sum is 35.

The square root of 225171539 is about 15005.7168772438. The cubic root of 225171539 is about 608.3747284189.

The spelling of 225171539 in words is "two hundred twenty-five million, one hundred seventy-one thousand, five hundred thirty-nine".