431900505 has 40 divisors (see below), whose sum is σ = 784080000. Its totient is φ = 227414304.

The previous prime is 431900503. The next prime is 431900537. The reversal of 431900505 is 505009134.

It is not a de Polignac number, because 431900505 - 2¹ = 431900503 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (431900503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 25246 + ... + 38744.

It is an arithmetic number, because the mean of its divisors is an integer number (19602000).

Almost surely, 2^431900505 is an apocalyptic number.

431900505 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

431900505 is a deficient number, since it is larger than the sum of its proper divisors (352179495).

431900505 is a wasteful number, since it uses less digits than its factorization.

431900505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13595 (or 13586 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 431900505 is about 20782.2160752890. The cubic root of 431900505 is about 755.8945903676.

Adding to 431900505 its reverse (505009134), we get a palindrome (936909639).

The spelling of 431900505 in words is "four hundred thirty-one million, nine hundred thousand, five hundred five".