431131145 has 4 divisors (see below), whose sum is σ = 517357380. Its totient is φ = 344904912.

The previous prime is 431131111. The next prime is 431131153. The reversal of 431131145 is 541131134.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 273703936 + 157427209 = 16544^2 + 12547^2 .

It is a cyclic number.

It is not a de Polignac number, because 431131145 - 2¹⁸ = 430869001 is a prime.

It is a super-2 number, since 2×431131145² = 371748128378022050, 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 431131145.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43113110 + ... + 43113119.

It is an arithmetic number, because the mean of its divisors is an integer number (129339345).

Almost surely, 2^431131145 is an apocalyptic number.

It is an amenable number.

431131145 is a deficient number, since it is larger than the sum of its proper divisors (86226235).

431131145 is an equidigital number, since it uses as much as digits as its factorization.

431131145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86226234.

The product of its digits is 720, while the sum is 23.

The square root of 431131145 is about 20763.6977679796. The cubic root of 431131145 is about 755.4454894655.

Adding to 431131145 its reverse (541131134), we get a palindrome (972262279).

The spelling of 431131145 in words is "four hundred thirty-one million, one hundred thirty-one thousand, one hundred forty-five".