225752021 has 8 divisors (see below), whose sum is σ = 252002784. Its totient is φ = 200455920.

The previous prime is 225752017. The next prime is 225752029. The reversal of 225752021 is 120257522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225752021 - 2² = 225752017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225752029) 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 7 ways as a sum of consecutive naturals, for example, 238166 + ... + 239111.

It is an arithmetic number, because the mean of its divisors is an integer number (31500348).

Almost surely, 2^225752021 is an apocalyptic number.

It is an amenable number.

225752021 is a deficient number, since it is larger than the sum of its proper divisors (26250763).

225752021 is a wasteful number, since it uses less digits than its factorization.

225752021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477331.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 225752021 is about 15025.0464558350. The cubic root of 225752021 is about 608.8970672927.

The spelling of 225752021 in words is "two hundred twenty-five million, seven hundred fifty-two thousand, twenty-one".