22371421 has 8 divisors (see below), whose sum is σ = 23051864. Its totient is φ = 21695040.

The previous prime is 22371407. The next prime is 22371449. The reversal of 22371421 is 12417322.

It can be written as a sum of positive squares in 4 ways, for example, as 11148921 + 11222500 = 3339^2 + 3350^2 .

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 22371421 - 2¹⁵ = 22338653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22371392 and 22371401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22371451) 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, 12991 + ... + 14611.

It is an arithmetic number, because the mean of its divisors is an integer number (2881483).

Almost surely, 2^22371421 is an apocalyptic number.

It is an amenable number.

22371421 is a deficient number, since it is larger than the sum of its proper divisors (680443).

22371421 is a wasteful number, since it uses less digits than its factorization.

22371421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2031.

The product of its digits is 672, while the sum is 22.

The square root of 22371421 is about 4729.8436549214. The cubic root of 22371421 is about 281.7720144819.

Adding to 22371421 its reverse (12417322), we get a palindrome (34788743).

The spelling of 22371421 in words is "twenty-two million, three hundred seventy-one thousand, four hundred twenty-one".