22131045 has 24 divisors (see below), whose sum is σ = 38891736. Its totient is φ = 11639808.

The previous prime is 22131017. The next prime is 22131049. The reversal of 22131045 is 54013122.

It can be written as a sum of positive squares in 4 ways, for example, as 2762244 + 19368801 = 1662^2 + 4401^2 .

It is not a de Polignac number, because 22131045 - 2⁹ = 22130533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22131049) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 84 + ... + 6653.

It is an arithmetic number, because the mean of its divisors is an integer number (1620489).

Almost surely, 2^22131045 is an apocalyptic number.

It is an amenable number.

22131045 is a deficient number, since it is larger than the sum of its proper divisors (16760691).

22131045 is a wasteful number, since it uses less digits than its factorization.

22131045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6821 (or 6818 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 22131045 is about 4704.3644629216. The cubic root of 22131045 is about 280.7591854502.

Adding to 22131045 its reverse (54013122), we get a palindrome (76144167).

The spelling of 22131045 in words is "twenty-two million, one hundred thirty-one thousand, forty-five".