291152641 has 8 divisors (see below), whose sum is σ = 313787880. Its totient is φ = 268551552.

The previous prime is 291152633. The next prime is 291152677. The reversal of 291152641 is 146251192.

It can be written as a sum of positive squares in 4 ways, for example, as 136399041 + 154753600 = 11679^2 + 12440^2 .

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 291152641 - 2³ = 291152633 is a prime.

It is a super-2 number, since 2×291152641² = 169539720722549762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (291152621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10815 + ... + 26443.

It is an arithmetic number, because the mean of its divisors is an integer number (39223485).

Almost surely, 2^291152641 is an apocalyptic number.

It is an amenable number.

291152641 is a deficient number, since it is larger than the sum of its proper divisors (22635239).

291152641 is a wasteful number, since it uses less digits than its factorization.

291152641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17075.

The product of its digits is 4320, while the sum is 31.

The square root of 291152641 is about 17063.1955096342. The cubic root of 291152641 is about 662.7863841234.

The spelling of 291152641 in words is "two hundred ninety-one million, one hundred fifty-two thousand, six hundred forty-one".