491525000 has 48 divisors (see below), whose sum is σ = 1151996580. Its totient is φ = 196600000.

The previous prime is 491524991. The next prime is 491525011. The reversal of 491525000 is 525194.

It can be written as a sum of positive squares in 6 ways, for example, as 50608996 + 440916004 = 7114^2 + 20998^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15170 + ... + 34830.

Almost surely, 2^491525000 is an apocalyptic number.

491525000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491525000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (575998290).

491525000 is an abundant number, since it is smaller than the sum of its proper divisors (660471580).

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

491525000 is an equidigital number, since it uses as much as digits as its factorization.

491525000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19692 (or 19668 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 491525000 is about 22170.3631003193. The cubic root of 491525000 is about 789.1905397880.

The spelling of 491525000 in words is "four hundred ninety-one million, five hundred twenty-five thousand".