225762021 has 6 divisors (see below), whose sum is σ = 326100710. Its totient is φ = 150508008.

The previous prime is 225762007. The next prime is 225762073. The reversal of 225762021 is 120267522.

It can be written as a sum of positive squares in only one way, i.e., 220522500 + 5239521 = 14850^2 + 2289^2 .

It is not a de Polignac number, because 225762021 - 2⁹ = 225761509 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 (225762001) 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 5 ways as a sum of consecutive naturals, for example, 12542326 + ... + 12542343.

Almost surely, 2^225762021 is an apocalyptic number.

It is an amenable number.

225762021 is a deficient number, since it is larger than the sum of its proper divisors (100338689).

225762021 is a wasteful number, since it uses less digits than its factorization.

225762021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25084675 (or 25084672 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 225762021 is about 15025.3792298231. The cubic root of 225762021 is about 608.9060578077.

The spelling of 225762021 in words is "two hundred twenty-five million, seven hundred sixty-two thousand, twenty-one".