431330421 has 16 divisors (see below), whose sum is σ = 590623488. Its totient is φ = 279864000.

The previous prime is 431330371. The next prime is 431330429. The reversal of 431330421 is 124033134.

It is not a de Polignac number, because 431330421 - 2⁹ = 431329909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431330429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17071 + ... + 33971.

It is an arithmetic number, because the mean of its divisors is an integer number (36913968).

Almost surely, 2^431330421 is an apocalyptic number.

It is an amenable number.

431330421 is a deficient number, since it is larger than the sum of its proper divisors (159293067).

431330421 is a wasteful number, since it uses less digits than its factorization.

431330421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17132.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 431330421 is about 20768.4958771693. The cubic root of 431330421 is about 755.5618647021.

Adding to 431330421 its reverse (124033134), we get a palindrome (555363555).

The spelling of 431330421 in words is "four hundred thirty-one million, three hundred thirty thousand, four hundred twenty-one".