225212511 has 8 divisors (see below), whose sum is σ = 301480704. Its totient is φ = 149543000.

The previous prime is 225212501. The next prime is 225212531. The reversal of 225212511 is 115212522.

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 225212511 - 2²¹ = 223115359 is a prime.

It is a super-2 number, since 2×225212511² = 101441350221850242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225212501) 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, 148791 + ... + 150296.

It is an arithmetic number, because the mean of its divisors is an integer number (37685088).

Almost surely, 2^225212511 is an apocalyptic number.

225212511 is a deficient number, since it is larger than the sum of its proper divisors (76268193).

225212511 is a wasteful number, since it uses less digits than its factorization.

225212511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299341.

The product of its digits is 400, while the sum is 21.

The square root of 225212511 is about 15007.0820281626. The cubic root of 225212511 is about 608.4116259442.

The spelling of 225212511 in words is "two hundred twenty-five million, two hundred twelve thousand, five hundred eleven".