2291506 has 8 divisors (see below), whose sum is σ = 3928320. Its totient is φ = 982068.

The previous prime is 2291491. The next prime is 2291539. The reversal of 2291506 is 6051922.

2291506 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

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

2291506 is strictly pandigital in base 8.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81826 + ... + 81853.

It is an arithmetic number, because the mean of its divisors is an integer number (491040).

2^2291506 is an apocalyptic number.

2291506 is a deficient number, since it is larger than the sum of its proper divisors (1636814).

2291506 is a wasteful number, since it uses less digits than its factorization.

2291506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163688.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 2291506 is about 1513.7721096651. The cubic root of 2291506 is about 131.8379170682.

The spelling of 2291506 in words is "two million, two hundred ninety-one thousand, five hundred six".