225021535 has 16 divisors (see below), whose sum is σ = 284414976. Its totient is φ = 170571808.

The previous prime is 225021509. The next prime is 225021539. The reversal of 225021535 is 535120522.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 225021535 - 2⁹ = 225021023 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 (225021539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3162 + ... + 21448.

It is an arithmetic number, because the mean of its divisors is an integer number (17775936).

Almost surely, 2^225021535 is an apocalyptic number.

225021535 is a deficient number, since it is larger than the sum of its proper divisors (59393441).

225021535 is a wasteful number, since it uses less digits than its factorization.

225021535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18422.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 225021535 is about 15000.7178161580. The cubic root of 225021535 is about 608.2396034153.

It can be divided in two parts, 2250215 and 35, that multiplied together give a triangular number (78757525 = T₁₂₅₅₀).

The spelling of 225021535 in words is "two hundred twenty-five million, twenty-one thousand, five hundred thirty-five".