225144551 has 4 divisors (see below), whose sum is σ = 225176952. Its totient is φ = 225112152.

The previous prime is 225144533. The next prime is 225144559. The reversal of 225144551 is 155441522.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 155441522 = 2 ⋅77720761.

It is a cyclic number.

It is not a de Polignac number, because 225144551 - 2¹⁸ = 224882407 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 (225144559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1061 + ... + 21246.

It is an arithmetic number, because the mean of its divisors is an integer number (56294238).

Almost surely, 2^225144551 is an apocalyptic number.

225144551 is a deficient number, since it is larger than the sum of its proper divisors (32401).

225144551 is a wasteful number, since it uses less digits than its factorization.

225144551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32400.

The product of its digits is 8000, while the sum is 29.

The square root of 225144551 is about 15004.8175930266. The cubic root of 225144551 is about 608.3504218047.

The spelling of 225144551 in words is "two hundred twenty-five million, one hundred forty-four thousand, five hundred fifty-one".