531105523 has 4 divisors (see below), whose sum is σ = 571959808. Its totient is φ = 490251240.

The previous prime is 531105479. The next prime is 531105539. The reversal of 531105523 is 325501135.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 325501135 = 5 ⋅65100227.

It is a cyclic number.

It is not a de Polignac number, because 531105523 - 2¹³ = 531097331 is a prime.

It is a super-2 number, since 2×531105523² = 564146153122207058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531805523) 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, 20427123 + ... + 20427148.

It is an arithmetic number, because the mean of its divisors is an integer number (142989952).

Almost surely, 2^531105523 is an apocalyptic number.

531105523 is a deficient number, since it is larger than the sum of its proper divisors (40854285).

531105523 is a wasteful number, since it uses less digits than its factorization.

531105523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40854284.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 531105523 is about 23045.7267839398. The cubic root of 531105523 is about 809.8295241499.

Adding to 531105523 its reverse (325501135), we get a palindrome (856606658).

The spelling of 531105523 in words is "five hundred thirty-one million, one hundred five thousand, five hundred twenty-three".