431621065 has 8 divisors (see below), whose sum is σ = 535805640. Its totient is φ = 333389952.

The previous prime is 431621017. The next prime is 431621093. The reversal of 431621065 is 560126134.

It can be written as a sum of positive squares in 4 ways, for example, as 146821689 + 284799376 = 12117^2 + 16876^2 .

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 431621065 - 2¹¹ = 431619017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1488204 + ... + 1488493.

It is an arithmetic number, because the mean of its divisors is an integer number (66975705).

Almost surely, 2^431621065 is an apocalyptic number.

It is an amenable number.

431621065 is a deficient number, since it is larger than the sum of its proper divisors (104184575).

431621065 is a wasteful number, since it uses less digits than its factorization.

431621065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976731.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 431621065 is about 20775.4919316006. The cubic root of 431621065 is about 755.7315337122.

Adding to 431621065 its reverse (560126134), we get a palindrome (991747199).

The spelling of 431621065 in words is "four hundred thirty-one million, six hundred twenty-one thousand, sixty-five".