525255521 has 8 divisors (see below), whose sum is σ = 600635904. Its totient is φ = 449961120.

The previous prime is 525255499. The next prime is 525255541. The reversal of 525255521 is 125552525.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 525255521 - 2¹⁴ = 525239137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525255541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7820 + ... + 33341.

It is an arithmetic number, because the mean of its divisors is an integer number (75079488).

Almost surely, 2^525255521 is an apocalyptic number.

It is an amenable number.

525255521 is a deficient number, since it is larger than the sum of its proper divisors (75380383).

525255521 is a wasteful number, since it uses less digits than its factorization.

525255521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42991.

The product of its digits is 25000, while the sum is 32.

The square root of 525255521 is about 22918.4537218373. The cubic root of 525255521 is about 806.8451795314.

The spelling of 525255521 in words is "five hundred twenty-five million, two hundred fifty-five thousand, five hundred twenty-one".