22155532000 has 192 divisors, whose sum is σ = 64919522304. Its totient is φ = 7265702400.

The previous prime is 22155531973. The next prime is 22155532001. The reversal of 22155532000 is 23555122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22155532001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 626799 + ... + 661201.

It is an arithmetic number, because the mean of its divisors is an integer number (338122512).

Almost surely, 2^22155532000 is an apocalyptic number.

22155532000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22155532000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32459761152).

22155532000 is an abundant number, since it is smaller than the sum of its proper divisors (42763990304).

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

22155532000 is a wasteful number, since it uses less digits than its factorization.

22155532000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34458 (or 34440 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The spelling of 22155532000 in words is "twenty-two billion, one hundred fifty-five million, five hundred thirty-two thousand".