291047225 has 72 divisors (see below), whose sum is σ = 462613248. Its totient is φ = 177292800.

The previous prime is 291047117. The next prime is 291047227. The reversal of 291047225 is 522740192.

It is not a de Polignac number, because 291047225 - 2⁸ = 291046969 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 291047191 and 291047200.

It is not an unprimeable number, because it can be changed into a prime (291047227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1073840 + ... + 1074110.

It is an arithmetic number, because the mean of its divisors is an integer number (6425184).

Almost surely, 2^291047225 is an apocalyptic number.

291047225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

291047225 is a deficient number, since it is larger than the sum of its proper divisors (171566023).

291047225 is a wasteful number, since it uses less digits than its factorization.

291047225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 319 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 291047225 is about 17060.1062423421. The cubic root of 291047225 is about 662.7063840208.

The spelling of 291047225 in words is "two hundred ninety-one million, forty-seven thousand, two hundred twenty-five".