531612409 has 8 divisors (see below), whose sum is σ = 561749760. Its totient is φ = 502060416.

The previous prime is 531612391. The next prime is 531612413. The reversal of 531612409 is 904216135.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 531612409 - 2¹³ = 531604217 is a prime.

It is a super-2 number, since 2×531612409² = 565223506805566562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (531612439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144472 + ... + 148105.

It is an arithmetic number, because the mean of its divisors is an integer number (70218720).

Almost surely, 2^531612409 is an apocalyptic number.

It is an amenable number.

531612409 is a deficient number, since it is larger than the sum of its proper divisors (30137351).

531612409 is a wasteful number, since it uses less digits than its factorization.

531612409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292679.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 531612409 is about 23056.7215579319. The cubic root of 531612409 is about 810.0870754330.

The spelling of 531612409 in words is "five hundred thirty-one million, six hundred twelve thousand, four hundred nine".