525531 has 8 divisors (see below), whose sum is σ = 704320. Its totient is φ = 348552.

The previous prime is 525529. The next prime is 525533. The reversal of 525531 is 135525.

It is an interprime number because it is at equal distance from previous prime (525529) and next prime (525533).

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

It is not a de Polignac number, because 525531 - 2¹ = 525529 is a prime.

It is a super-2 number, since 2×525531² = 552365663922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 525498 and 525507.

It is not an unprimeable number, because it can be changed into a prime (525533) 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, 540 + ... + 1158.

It is an arithmetic number, because the mean of its divisors is an integer number (88040).

2⁵²⁵⁵³¹ is an apocalyptic number.

525531 is a deficient number, since it is larger than the sum of its proper divisors (178789).

525531 is a wasteful number, since it uses less digits than its factorization.

525531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905.

The product of its digits is 750, while the sum is 21.

The square root of 525531 is about 724.9351695152. The cubic root of 525531 is about 80.6986209340.

The spelling of 525531 in words is "five hundred twenty-five thousand, five hundred thirty-one".