22532021 has 8 divisors (see below), whose sum is σ = 23920344. Its totient is φ = 21150720.

The previous prime is 22532017. The next prime is 22532023. The reversal of 22532021 is 12023522.

It can be written as a sum of positive squares in 4 ways, for example, as 7236100 + 15295921 = 2690^2 + 3911^2 .

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

It is not a de Polignac number, because 22532021 - 2² = 22532017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22532023) 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 7 ways as a sum of consecutive naturals, for example, 5831 + ... + 8891.

It is an arithmetic number, because the mean of its divisors is an integer number (2990043).

Almost surely, 2^22532021 is an apocalyptic number.

It is an amenable number.

22532021 is a deficient number, since it is larger than the sum of its proper divisors (1388323).

22532021 is a wasteful number, since it uses less digits than its factorization.

22532021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3511.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 22532021 is about 4746.7905999738. The cubic root of 22532021 is about 282.4446692481. Note that the first 3 decimals are identical.

Adding to 22532021 its reverse (12023522), we get a palindrome (34555543).

The spelling of 22532021 in words is "twenty-two million, five hundred thirty-two thousand, twenty-one".