2213172431 has 4 divisors (see below), whose sum is σ = 2213343000. Its totient is φ = 2213001864.

The previous prime is 2213172419. The next prime is 2213172469. The reversal of 2213172431 is 1342713122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2213172431 is a prime.

It is a super-2 number, since 2×2213172431² = 9796264418676899522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2213172431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2213177431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64061 + ... + 92358.

It is an arithmetic number, because the mean of its divisors is an integer number (553335750).

Almost surely, 2^2213172431 is an apocalyptic number.

2213172431 is a deficient number, since it is larger than the sum of its proper divisors (170569).

2213172431 is a wasteful number, since it uses less digits than its factorization.

2213172431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170568.

The product of its digits is 2016, while the sum is 26.

The square root of 2213172431 is about 47044.3666234332. The cubic root of 2213172431 is about 1303.1820335237.

Adding to 2213172431 its reverse (1342713122), we get a palindrome (3555885553).

The spelling of 2213172431 in words is "two billion, two hundred thirteen million, one hundred seventy-two thousand, four hundred thirty-one".