104511531 has 4 divisors (see below), whose sum is σ = 139348712. Its totient is φ = 69674352.

The previous prime is 104511521. The next prime is 104511541. The reversal of 104511531 is 135115401.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 135115401 = 3 ⋅45038467.

It is an interprime number because it is at equal distance from previous prime (104511521) and next prime (104511541).

It is not a de Polignac number, because 104511531 - 2⁵ = 104511499 is a prime.

It is a super-2 number, since 2×104511531² = 21845320223927922, 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 = 104511498 and 104511507.

It is not an unprimeable number, because it can be changed into a prime (104511521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17418586 + ... + 17418591.

It is an arithmetic number, because the mean of its divisors is an integer number (34837178).

Almost surely, 2^104511531 is an apocalyptic number.

104511531 is a deficient number, since it is larger than the sum of its proper divisors (34837181).

104511531 is an equidigital number, since it uses as much as digits as its factorization.

104511531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34837180.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 104511531 is about 10223.0881342185. The cubic root of 104511531 is about 471.0366900886.

Adding to 104511531 its reverse (135115401), we get a palindrome (239626932).

The spelling of 104511531 in words is "one hundred four million, five hundred eleven thousand, five hundred thirty-one".