531520023 has 16 divisors (see below), whose sum is σ = 737890272. Its totient is φ = 340032000.

The previous prime is 531520007. The next prime is 531520027. The reversal of 531520023 is 320025135.

It is not a de Polignac number, because 531520023 - 2⁴ = 531520007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531520027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27918 + ... + 42923.

It is an arithmetic number, because the mean of its divisors is an integer number (46118142).

Almost surely, 2^531520023 is an apocalyptic number.

531520023 is a deficient number, since it is larger than the sum of its proper divisors (206370249).

531520023 is a wasteful number, since it uses less digits than its factorization.

531520023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70946.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 531520023 is about 23054.7180203966. The cubic root of 531520023 is about 810.0401458535.

Adding to 531520023 its reverse (320025135), we get a palindrome (851545158).

The spelling of 531520023 in words is "five hundred thirty-one million, five hundred twenty thousand, twenty-three".