225021351 has 16 divisors (see below), whose sum is σ = 329552640. Its totient is φ = 135938880.

The previous prime is 225021347. The next prime is 225021359. The reversal of 225021351 is 153120522.

It is not a de Polignac number, because 225021351 - 2² = 225021347 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225021359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84510 + ... + 87131.

It is an arithmetic number, because the mean of its divisors is an integer number (20597040).

Almost surely, 2^225021351 is an apocalyptic number.

225021351 is a deficient number, since it is larger than the sum of its proper divisors (104531289).

225021351 is a wasteful number, since it uses less digits than its factorization.

225021351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171686.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 225021351 is about 15000.7116831169. The cubic root of 225021351 is about 608.2394376295.

Adding to 225021351 its reverse (153120522), we get a palindrome (378141873).

The spelling of 225021351 in words is "two hundred twenty-five million, twenty-one thousand, three hundred fifty-one".