22331421 has 48 divisors (see below), whose sum is σ = 40435200. Its totient is φ = 11579904.

The previous prime is 22331401. The next prime is 22331453. The reversal of 22331421 is 12413322.

It is not a de Polignac number, because 22331421 - 2⁷ = 22331293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22331394 and 22331403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22331401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30700 + ... + 31418.

It is an arithmetic number, because the mean of its divisors is an integer number (842400).

Almost surely, 2^22331421 is an apocalyptic number.

22331421 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

22331421 is a deficient number, since it is larger than the sum of its proper divisors (18103779).

22331421 is a wasteful number, since it uses less digits than its factorization.

22331421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778 (or 775 counting only the distinct ones).

The product of its digits is 288, while the sum is 18.

The square root of 22331421 is about 4725.6132935313. The cubic root of 22331421 is about 281.6039785953.

Adding to 22331421 its reverse (12413322), we get a palindrome (34744743).

The spelling of 22331421 in words is "twenty-two million, three hundred thirty-one thousand, four hundred twenty-one".