22131550 has 48 divisors (see below), whose sum is σ = 48345120. Its totient is φ = 7378560.

The previous prime is 22131547. The next prime is 22131563. The reversal of 22131550 is 5513122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12096 + ... + 13804.

It is an arithmetic number, because the mean of its divisors is an integer number (1007190).

Almost surely, 2^22131550 is an apocalyptic number.

22131550 is an abundant number, since it is smaller than the sum of its proper divisors (26213570).

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

22131550 is a wasteful number, since it uses less digits than its factorization.

22131550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1765 (or 1760 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 22131550 is about 4704.4181361779. The cubic root of 22131550 is about 280.7613209468.

Adding to 22131550 its reverse (5513122), we get a palindrome (27644672).

The spelling of 22131550 in words is "twenty-two million, one hundred thirty-one thousand, five hundred fifty".