3223731 has 8 divisors (see below), whose sum is σ = 4912384. Its totient is φ = 1842120.

The previous prime is 3223729. The next prime is 3223739. The reversal of 3223731 is 1373223.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3223731 - 2¹ = 3223729 is a prime.

It is a super-2 number, since 2×3223731² = 20784883120722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 153511 = 3223731 / (3 + 2 + 2 + 3 + 7 + 3 + 1).

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3223698 and 3223707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3223739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76735 + ... + 76776.

It is an arithmetic number, because the mean of its divisors is an integer number (614048).

Almost surely, 2^3223731 is an apocalyptic number.

3223731 is a deficient number, since it is larger than the sum of its proper divisors (1688653).

3223731 is a wasteful number, since it uses less digits than its factorization.

3223731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153521.

The product of its digits is 756, while the sum is 21.

The square root of 3223731 is about 1795.4751460268. The cubic root of 3223731 is about 147.7246371242.

Adding to 3223731 its reverse (1373223), we get a palindrome (4596954).

The spelling of 3223731 in words is "three million, two hundred twenty-three thousand, seven hundred thirty-one".