225305551 has 16 divisors (see below), whose sum is σ = 237219840. Its totient is φ = 213726240.

The previous prime is 225305533. The next prime is 225305557. The reversal of 225305551 is 155503522.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225305551 is a prime.

It is a super-2 number, since 2×225305551² = 101525182622827202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225305557) 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 15 ways as a sum of consecutive naturals, for example, 482220 + ... + 482686.

It is an arithmetic number, because the mean of its divisors is an integer number (14826240).

Almost surely, 2^225305551 is an apocalyptic number.

225305551 is a deficient number, since it is larger than the sum of its proper divisors (11914289).

225305551 is a wasteful number, since it uses less digits than its factorization.

225305551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 225305551 is about 15010.1815778491. The cubic root of 225305551 is about 608.4953969332.

The spelling of 225305551 in words is "two hundred twenty-five million, three hundred five thousand, five hundred fifty-one".