521453000 has 64 divisors (see below), whose sum is σ = 1225551600. Its totient is φ = 207667200.

The previous prime is 521452999. The next prime is 521453011. The reversal of 521453000 is 354125.

It can be written as a sum of positive squares in 8 ways, for example, as 298667524 + 222785476 = 17282^2 + 14926^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255986 + ... + 258014.

Almost surely, 2^521453000 is an apocalyptic number.

521453000 is a gapful number since it is divisible by the number (50) 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 521453000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (612775800).

521453000 is an abundant number, since it is smaller than the sum of its proper divisors (704098600).

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

521453000 is a wasteful number, since it uses less digits than its factorization.

521453000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307 (or 2293 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 521453000 is about 22835.3454101312. The cubic root of 521453000 is about 804.8934442246.

The spelling of 521453000 in words is "five hundred twenty-one million, four hundred fifty-three thousand".