531135529 has 4 divisors (see below), whose sum is σ = 531208276. Its totient is φ = 531062784.

The previous prime is 531135511. The next prime is 531135533. The reversal of 531135529 is 925531135.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 107599129 + 423536400 = 10373^2 + 20580^2 .

It is a 5-Lehmer number, since φ(531135529) divides (531135529-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 531135529 - 2⁷ = 531135401 is a prime.

It is a super-2 number, since 2×531135529² = 564209900332219682, which contains 22 as substring.

It is a pancake number, because a pancake can be divided into 531135529 parts by 32592 straight cuts.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 531135494 and 531135503.

It is not an unprimeable number, because it can be changed into a prime (531135559) 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, 24024 + ... + 40489.

It is an arithmetic number, because the mean of its divisors is an integer number (132802069).

Almost surely, 2^531135529 is an apocalyptic number.

It is an amenable number.

531135529 is a deficient number, since it is larger than the sum of its proper divisors (72747).

531135529 is an equidigital number, since it uses as much as digits as its factorization.

531135529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72746.

The product of its digits is 20250, while the sum is 34.

The square root of 531135529 is about 23046.3777848060. The cubic root of 531135529 is about 809.8447749090.

The spelling of 531135529 in words is "five hundred thirty-one million, one hundred thirty-five thousand, five hundred twenty-nine".