545521900 has 216 divisors, whose sum is σ = 1558494000. Its totient is φ = 163699200.

The previous prime is 545521877. The next prime is 545521909. The reversal of 545521900 is 9125545.

It is a super-2 number, since 2×545521900² = 595188286759220000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (545521909) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1562926 + ... + 1563274.

It is an arithmetic number, because the mean of its divisors is an integer number (7215250).

Almost surely, 2^545521900 is an apocalyptic number.

545521900 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 545521900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (779247000).

545521900 is an abundant number, since it is smaller than the sum of its proper divisors (1012972100).

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

545521900 is a wasteful number, since it uses less digits than its factorization.

545521900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 403 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 31.

The square root of 545521900 is about 23356.4102550028. The cubic root of 545521900 is about 817.0915702717.

The spelling of 545521900 in words is "five hundred forty-five million, five hundred twenty-one thousand, nine hundred".