22531250 has 56 divisors (see below), whose sum is σ = 48749376. Its totient is φ = 7650000.

The previous prime is 22531241. The next prime is 22531253. The reversal of 22531250 is 5213522.

It is not an unprimeable number, because it can be changed into a prime (22531253) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 218699 + ... + 218801.

Almost surely, 2^22531250 is an apocalyptic number.

22531250 is an abundant number, since it is smaller than the sum of its proper divisors (26218126).

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

22531250 is an frugal number, since it uses more digits than its factorization.

22531250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 117 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 22531250 is about 4746.7093865119. The cubic root of 22531250 is about 282.4414476504.

Adding to 22531250 its reverse (5213522), we get a palindrome (27744772).

It can be divided in two parts, 2 and 2531250, that multiplied together give a square (5062500 = 2250²).

The spelling of 22531250 in words is "twenty-two million, five hundred thirty-one thousand, two hundred fifty".