491516235 has 32 divisors (see below), whose sum is σ = 998638080. Its totient is φ = 224692704.

The previous prime is 491516219. The next prime is 491516239. The reversal of 491516235 is 532615194.

491516235 is a `hidden beast` number, since 491 + 5 + 162 + 3 + 5 = 666.

It is not a de Polignac number, because 491516235 - 2⁴ = 491516219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 491516235.

It is not an unprimeable number, because it can be changed into a prime (491516239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 259117 + ... + 261006.

It is an arithmetic number, because the mean of its divisors is an integer number (31207440).

Almost surely, 2^491516235 is an apocalyptic number.

491516235 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

491516235 is an abundant number, since it is smaller than the sum of its proper divisors (507121845).

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

491516235 is a wasteful number, since it uses less digits than its factorization.

491516235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520144 (or 520138 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 491516235 is about 22170.1654256345. The cubic root of 491516235 is about 789.1858487440.

The spelling of 491516235 in words is "four hundred ninety-one million, five hundred sixteen thousand, two hundred thirty-five".