225511871 has 4 divisors (see below), whose sum is σ = 242858952. Its totient is φ = 208164792.

The previous prime is 225511861. The next prime is 225511877. The reversal of 225511871 is 178115522.

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 225511871 - 2⁶ = 225511807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225511877) 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, 8673521 + ... + 8673546.

It is an arithmetic number, because the mean of its divisors is an integer number (60714738).

Almost surely, 2^225511871 is an apocalyptic number.

225511871 is a deficient number, since it is larger than the sum of its proper divisors (17347081).

225511871 is a wasteful number, since it uses less digits than its factorization.

225511871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17347080.

The product of its digits is 5600, while the sum is 32.

The square root of 225511871 is about 15017.0526735442. The cubic root of 225511871 is about 608.6810802824.

The spelling of 225511871 in words is "two hundred twenty-five million, five hundred eleven thousand, eight hundred seventy-one".