225076991 has 4 divisors (see below), whose sum is σ = 238316832. Its totient is φ = 211837152.

The previous prime is 225076987. The next prime is 225076997. The reversal of 225076991 is 199670522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199670522 = 2 ⋅99835261.

It is a cyclic number.

It is not a de Polignac number, because 225076991 - 2² = 225076987 is a prime.

It is a super-2 number, since 2×225076991² = 101319303755228162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225076997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6619895 + ... + 6619928.

It is an arithmetic number, because the mean of its divisors is an integer number (59579208).

Almost surely, 2^225076991 is an apocalyptic number.

225076991 is a deficient number, since it is larger than the sum of its proper divisors (13239841).

225076991 is a wasteful number, since it uses less digits than its factorization.

225076991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13239840.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 225076991 is about 15002.5661471630. The cubic root of 225076991 is about 608.2895656925.

The spelling of 225076991 in words is "two hundred twenty-five million, seventy-six thousand, nine hundred ninety-one".