4022731 has 4 divisors (see below), whose sum is σ = 4052232. Its totient is φ = 3993232.

The previous prime is 4022719. The next prime is 4022741. The reversal of 4022731 is 1372204.

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

It is a cyclic number.

It is not a de Polignac number, because 4022731 - 2¹⁵ = 3989963 is a prime.

It is a super-2 number, since 2×4022731² = 32364729396722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4022699 and 4022708.

It is not an unprimeable number, because it can be changed into a prime (4022701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14545 + ... + 14818.

It is an arithmetic number, because the mean of its divisors is an integer number (1013058).

Almost surely, 2^4022731 is an apocalyptic number.

4022731 is the 1269-th centered pentagonal number.

4022731 is a deficient number, since it is larger than the sum of its proper divisors (29501).

4022731 is a wasteful number, since it uses less digits than its factorization.

4022731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29500.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 4022731 is about 2005.6746994465. The cubic root of 4022731 is about 159.0402308440.

Adding to 4022731 its reverse (1372204), we get a palindrome (5394935).

It can be divided in two parts, 4022 and 731, that added together give a triangular number (4753 = T₉₇).

The spelling of 4022731 in words is "four million, twenty-two thousand, seven hundred thirty-one".