22021031 has 8 divisors (see below), whose sum is σ = 23143824. Its totient is φ = 20926080.

The previous prime is 22021009. The next prime is 22021049. The reversal of 22021031 is 13012022.

It is a happy number.

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 22021031 - 2¹⁸ = 21758887 is a prime.

It is a super-2 number, since 2×22021031² = 969851612605922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22021331) 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, 5330 + ... + 8511.

It is an arithmetic number, because the mean of its divisors is an integer number (2892978).

Almost surely, 2^22021031 is an apocalyptic number.

22021031 is a deficient number, since it is larger than the sum of its proper divisors (1122793).

22021031 is a wasteful number, since it uses less digits than its factorization.

22021031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13921.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 22021031 is about 4692.6571364207. The cubic root of 22021031 is about 280.2931920369.

Adding to 22021031 its reverse (13012022), we get a palindrome (35033053).

Subtracting from 22021031 its reverse (13012022), we obtain a palindrome (9009009).

The spelling of 22021031 in words is "twenty-two million, twenty-one thousand, thirty-one".