22031901 has 12 divisors (see below), whose sum is σ = 32153212. Its totient is φ = 14535936.

The previous prime is 22031899. The next prime is 22031921. The reversal of 22031901 is 10913022.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13616100 + 8415801 = 3690^2 + 2901^2 .

It is not a de Polignac number, because 22031901 - 2¹ = 22031899 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22031921) 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 11 ways as a sum of consecutive naturals, for example, 11746 + ... + 13491.

Almost surely, 2^22031901 is an apocalyptic number.

It is an amenable number.

22031901 is a deficient number, since it is larger than the sum of its proper divisors (10121311).

22031901 is a wasteful number, since it uses less digits than its factorization.

22031901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25340 (or 25337 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 22031901 is about 4693.8151859655. The cubic root of 22031901 is about 280.3393038019.

Adding to 22031901 its reverse (10913022), we get a palindrome (32944923).

The spelling of 22031901 in words is "twenty-two million, thirty-one thousand, nine hundred one".