491225155 has 8 divisors (see below), whose sum is σ = 589957200. Its totient is φ = 392655456.

The previous prime is 491225143. The next prime is 491225179. The reversal of 491225155 is 551522194.

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 491225155 - 2¹¹ = 491223107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 491225155.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33825 + ... + 46114.

It is an arithmetic number, because the mean of its divisors is an integer number (73744650).

Almost surely, 2^491225155 is an apocalyptic number.

491225155 is a deficient number, since it is larger than the sum of its proper divisors (98732045).

491225155 is a wasteful number, since it uses less digits than its factorization.

491225155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81173.

The product of its digits is 18000, while the sum is 34.

The square root of 491225155 is about 22163.5997753073. The cubic root of 491225155 is about 789.0300305079.

The spelling of 491225155 in words is "four hundred ninety-one million, two hundred twenty-five thousand, one hundred fifty-five".