225555251 has 8 divisors (see below), whose sum is σ = 239647680. Its totient is φ = 211684968.

The previous prime is 225555241. The next prime is 225555263. The reversal of 225555251 is 152555522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225555251 - 2¹⁴ = 225538867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225555221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53441 + ... + 57506.

It is an arithmetic number, because the mean of its divisors is an integer number (29955960).

Almost surely, 2^225555251 is an apocalyptic number.

225555251 is a deficient number, since it is larger than the sum of its proper divisors (14092429).

225555251 is a wasteful number, since it uses less digits than its factorization.

225555251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111073.

The product of its digits is 25000, while the sum is 32.

The square root of 225555251 is about 15018.4969620798. The cubic root of 225555251 is about 608.7201068936.

It can be divided in two parts, 2255 and 55251, that multiplied together give a triangular number (124591005 = T₁₅₇₈₅).

The spelling of 225555251 in words is "two hundred twenty-five million, five hundred fifty-five thousand, two hundred fifty-one".