22531420 has 24 divisors (see below), whose sum is σ = 48843648. Its totient is φ = 8721600.

The previous prime is 22531417. The next prime is 22531433. The reversal of 22531420 is 2413522.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17551 + ... + 18790.

It is an arithmetic number, because the mean of its divisors is an integer number (2035152).

Almost surely, 2^22531420 is an apocalyptic number.

22531420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22531420 is an abundant number, since it is smaller than the sum of its proper divisors (26312228).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22531420 is a wasteful number, since it uses less digits than its factorization.

22531420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36381 (or 36379 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 22531420 is about 4746.7272936203. The cubic root of 22531420 is about 282.4421579960.

Adding to 22531420 its reverse (2413522), we get a palindrome (24944942).

The spelling of 22531420 in words is "twenty-two million, five hundred thirty-one thousand, four hundred twenty".