431342921 has 16 divisors (see below), whose sum is σ = 481599360. Its totient is φ = 383927040.

The previous prime is 431342917. The next prime is 431342939. The reversal of 431342921 is 129243134.

It is a cyclic number.

It is not a de Polignac number, because 431342921 - 2² = 431342917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (431342971) 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, 311651 + ... + 313031.

It is an arithmetic number, because the mean of its divisors is an integer number (30099960).

Almost surely, 2^431342921 is an apocalyptic number.

It is an amenable number.

431342921 is a deficient number, since it is larger than the sum of its proper divisors (50256439).

431342921 is a wasteful number, since it uses less digits than its factorization.

431342921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2384.

The product of its digits is 5184, while the sum is 29.

The square root of 431342921 is about 20768.7968115633. The cubic root of 431342921 is about 755.5691633851.

The spelling of 431342921 in words is "four hundred thirty-one million, three hundred forty-two thousand, nine hundred twenty-one".