431213101 has 4 divisors (see below), whose sum is σ = 470414304. Its totient is φ = 392011900.

The previous prime is 431213089. The next prime is 431213129. The reversal of 431213101 is 101312134.

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 a cyclic number.

It is not a de Polignac number, because 431213101 - 2²⁷ = 296995373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (431213191) 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, 19600585 + ... + 19600606.

It is an arithmetic number, because the mean of its divisors is an integer number (117603576).

Almost surely, 2^431213101 is an apocalyptic number.

It is an amenable number.

431213101 is a deficient number, since it is larger than the sum of its proper divisors (39201203).

431213101 is a wasteful number, since it uses less digits than its factorization.

431213101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39201202.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 431213101 is about 20765.6712147717. The cubic root of 431213101 is about 755.4933553091.

Adding to 431213101 its reverse (101312134), we get a palindrome (532525235).

The spelling of 431213101 in words is "four hundred thirty-one million, two hundred thirteen thousand, one hundred one".