505812431 has 8 divisors (see below), whose sum is σ = 512977920. Its totient is φ = 498666168.

The previous prime is 505812379. The next prime is 505812451. The reversal of 505812431 is 134218505.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505812431 is a prime.

It is a super-2 number, since 2×505812431² = 511692430708259522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 505812394 and 505812403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505812451) 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, 53030 + ... + 61836.

It is an arithmetic number, because the mean of its divisors is an integer number (64122240).

Almost surely, 2^505812431 is an apocalyptic number.

505812431 is a deficient number, since it is larger than the sum of its proper divisors (7165489).

505812431 is an equidigital number, since it uses as much as digits as its factorization.

505812431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9613.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 505812431 is about 22490.2741423932. The cubic root of 505812431 is about 796.7642377612.

The spelling of 505812431 in words is "five hundred five million, eight hundred twelve thousand, four hundred thirty-one".