525455280 has 240 divisors, whose sum is σ = 2034137664. Its totient is φ = 119070720.

The previous prime is 525455269. The next prime is 525455297. The reversal of 525455280 is 82554525.

It is a happy number.

525455280 is a `hidden beast` number, since 5 + 25 + 4 + 552 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (240).

It is a super-2 number, since 2×525455280² = 552206502559756800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 690100 + ... + 690860.

Almost surely, 2^525455280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 525455280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1017068832).

525455280 is an abundant number, since it is smaller than the sum of its proper divisors (1508682384).

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

525455280 is a wasteful number, since it uses less digits than its factorization.

525455280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924 (or 915 counting only the distinct ones).

The product of its (nonzero) digits is 80000, while the sum is 36.

The square root of 525455280 is about 22922.8113459061. The cubic root of 525455280 is about 806.9474498564.

The spelling of 525455280 in words is "five hundred twenty-five million, four hundred fifty-five thousand, two hundred eighty".