531129669 has 16 divisors (see below), whose sum is σ = 825859200. Its totient is φ = 303502080.

The previous prime is 531129659. The next prime is 531129671. The reversal of 531129669 is 966921135.

It is not a de Polignac number, because 531129669 - 2¹³ = 531121477 is a prime.

It is a super-2 number, since 2×531129669² = 564197450584099122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 531129669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531129619) 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, 257052 + ... + 259109.

It is an arithmetic number, because the mean of its divisors is an integer number (51616200).

Almost surely, 2^531129669 is an apocalyptic number.

It is an amenable number.

531129669 is a deficient number, since it is larger than the sum of its proper divisors (294729531).

531129669 is an equidigital number, since it uses as much as digits as its factorization.

531129669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516185 (or 516171 counting only the distinct ones).

The product of its digits is 87480, while the sum is 42.

The square root of 531129669 is about 23046.2506495091. The cubic root of 531129669 is about 809.8417965682.

It can be divided in two parts, 5311 and 29669, that added together give a triangular number (34980 = T₂₆₄).

The spelling of 531129669 in words is "five hundred thirty-one million, one hundred twenty-nine thousand, six hundred sixty-nine".