75531 has 8 divisors (see below), whose sum is σ = 106704. Its totient is φ = 47360.

The previous prime is 75527. The next prime is 75533. The reversal of 75531 is 13557.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 75531 - 2² = 75527 is a prime.

It is a super-2 number, since 2×75531² = 11409863922, which contains 22 as substring.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 75498 and 75507.

It is not an unprimeable number, because it can be changed into a prime (75533) 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, 690 + ... + 791.

It is an arithmetic number, because the mean of its divisors is an integer number (13338).

2⁷⁵⁵³¹ is an apocalyptic number.

75531 is a deficient number, since it is larger than the sum of its proper divisors (31173).

75531 is a wasteful number, since it uses less digits than its factorization.

75531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501.

The product of its digits is 525, while the sum is 21.

The square root of 75531 is about 274.8290377671. The cubic root of 75531 is about 42.2709243600.

It can be divided in two parts, 75 and 531, that added together give a palindrome (606).

The spelling of 75531 in words is "seventy-five thousand, five hundred thirty-one".