20224531 has 8 divisors (see below), whose sum is σ = 21344400. Its totient is φ = 19110240.

The previous prime is 20224517. The next prime is 20224537. The reversal of 20224531 is 13542202.

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

It is a cyclic number.

It is not a de Polignac number, because 20224531 - 2¹⁵ = 20191763 is a prime.

It is a super-2 number, since 2×20224531² = 818063308339922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20224499 and 20224508.

It is not an unprimeable number, because it can be changed into a prime (20224537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7605 + ... + 9913.

It is an arithmetic number, because the mean of its divisors is an integer number (2668050).

Almost surely, 2^20224531 is an apocalyptic number.

20224531 is a deficient number, since it is larger than the sum of its proper divisors (1119869).

20224531 is a wasteful number, since it uses less digits than its factorization.

20224531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2789.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 20224531 is about 4497.1692207432. The cubic root of 20224531 is about 272.4537687752.

Adding to 20224531 its reverse (13542202), we get a palindrome (33766733).

The spelling of 20224531 in words is "twenty million, two hundred twenty-four thousand, five hundred thirty-one".