22031421 has 8 divisors (see below), whose sum is σ = 30322944. Its totient is φ = 14213760.

The previous prime is 22031419. The next prime is 22031423. The reversal of 22031421 is 12413022.

It is an interprime number because it is at equal distance from previous prime (22031419) and next prime (22031423).

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

It is not a de Polignac number, because 22031421 - 2¹ = 22031419 is a prime.

It is a super-2 number, since 2×22031421² = 970767022558482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22031421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22031423) 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, 118356 + ... + 118541.

It is an arithmetic number, because the mean of its divisors is an integer number (3790368).

Almost surely, 2^22031421 is an apocalyptic number.

It is an amenable number.

22031421 is a deficient number, since it is larger than the sum of its proper divisors (8291523).

22031421 is a wasteful number, since it uses less digits than its factorization.

22031421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236931.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 22031421 is about 4693.7640545728. The cubic root of 22031421 is about 280.3372679079.

Adding to 22031421 its reverse (12413022), we get a palindrome (34444443).

The spelling of 22031421 in words is "twenty-two million, thirty-one thousand, four hundred twenty-one".