225031551 has 4 divisors (see below), whose sum is σ = 300042072. Its totient is φ = 150021032.

The previous prime is 225031531. The next prime is 225031553. The reversal of 225031551 is 155130522.

It is a happy number.

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 225031551 - 2⁷ = 225031423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225031553) 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, 37505256 + ... + 37505261.

It is an arithmetic number, because the mean of its divisors is an integer number (75010518).

Almost surely, 2^225031551 is an apocalyptic number.

225031551 is a deficient number, since it is larger than the sum of its proper divisors (75010521).

225031551 is an equidigital number, since it uses as much as digits as its factorization.

225031551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75010520.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 225031551 is about 15001.0516631335. The cubic root of 225031551 is about 608.2486277923.

The spelling of 225031551 in words is "two hundred twenty-five million, thirty-one thousand, five hundred fifty-one".