22081511250 has 150 divisors (see below), whose sum is σ = 61961565171. Its totient is φ = 5875794000.

The previous prime is 22081511239. The next prime is 22081511269. The reversal of 22081511250 is 5211518022.

It is a happy number.

22081511250 is a `hidden beast` number, since 2 + 20 + 81 + 511 + 2 + 50 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 5105245401 + 16976265849 = 71451^2 + 130293^2 .

It is a tau number, because it is divible by the number of its divisors (150).

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=105075.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 74 ways as a sum of consecutive naturals, for example, 47283517 + ... + 47283983.

Almost surely, 2^22081511250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22081511250

22081511250 is an abundant number, since it is smaller than the sum of its proper divisors (39880053921).

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

22081511250 is an frugal number, since it uses more digits than its factorization.

22081511250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The spelling of 22081511250 in words is "twenty-two billion, eighty-one million, five hundred eleven thousand, two hundred fifty".