491715522 has 40 divisors (see below), whose sum is σ = 1108882236. Its totient is φ = 162852768.

The previous prime is 491715491. The next prime is 491715527. The reversal of 491715522 is 225517194.

It can be written as a sum of positive squares in 2 ways, for example, as 478690641 + 13024881 = 21879^2 + 3609^2 .

It is not an unprimeable number, because it can be changed into a prime (491715527) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15768 + ... + 35100.

Almost surely, 2^491715522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491715522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (554441118).

491715522 is an abundant number, since it is smaller than the sum of its proper divisors (617166714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

491715522 is a wasteful number, since it uses less digits than its factorization.

491715522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19504 (or 19495 counting only the distinct ones).

The product of its digits is 25200, while the sum is 36.

The square root of 491715522 is about 22174.6594562352. The cubic root of 491715522 is about 789.2924937322.

The spelling of 491715522 in words is "four hundred ninety-one million, seven hundred fifteen thousand, five hundred twenty-two".