22155523000 has 64 divisors (see below), whose sum is σ = 55831950720. Its totient is φ = 8180496000.

The previous prime is 22155522997. The next prime is 22155523057. The reversal of 22155523000 is 32555122.

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 an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 839136 + ... + 865135.

It is an arithmetic number, because the mean of its divisors is an integer number (872374230).

Almost surely, 2^22155523000 is an apocalyptic number.

22155523000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22155523000 is an abundant number, since it is smaller than the sum of its proper divisors (33676427720).

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

22155523000 is a wasteful number, since it uses less digits than its factorization.

22155523000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704305 (or 1704291 counting only the distinct ones).

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

The spelling of 22155523000 in words is "twenty-two billion, one hundred fifty-five million, five hundred twenty-three thousand".