431525109 has 4 divisors (see below), whose sum is σ = 575366816. Its totient is φ = 287683404.

The previous prime is 431525089. The next prime is 431525111. The reversal of 431525109 is 901525134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 431525109 - 2¹¹ = 431523061 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431525309) 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, 71920849 + ... + 71920854.

It is an arithmetic number, because the mean of its divisors is an integer number (143841704).

Almost surely, 2^431525109 is an apocalyptic number.

It is an amenable number.

431525109 is a deficient number, since it is larger than the sum of its proper divisors (143841707).

431525109 is a wasteful number, since it uses less digits than its factorization.

431525109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143841706.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 431525109 is about 20773.1824475693. The cubic root of 431525109 is about 755.6755259811.

The spelling of 431525109 in words is "four hundred thirty-one million, five hundred twenty-five thousand, one hundred nine".