22091927042025 has 135 divisors (see below), whose sum is σ = 41257227067903. Its totient is φ = 11686589712000.

The previous prime is 22091927041997. The next prime is 22091927042041. The reversal of 22091927042025 is 52024072919022.

The square root of 22091927042025 is 4700205.

It is a perfect power (a square), and thus also a powerful number.

22091927042025 is a `hidden beast` number, since 2 + 209 + 19 + 2 + 7 + 0 + 420 + 2 + 5 = 666.

It can be written as a sum of positive squares in 13 ways, for example, as 14782279421529 + 7309647620496 = 3844773^2 + 2703636^2 .

It is a tau number, because it is divible by the number of its divisors (135).

It is not a de Polignac number, because 22091927042025 - 2¹⁹ = 22091926517737 is a prime.

It is a super-2 number, since 2×22091927042025² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 134 ways as a sum of consecutive naturals, for example, 31514874175 + ... + 31514874875.

Almost surely, 2^{22091927042025} is an apocalyptic number.

22091927042025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22091927042025 is the 4700205-th square number.

22091927042025 is the 2350103-rd centered octagonal number.

It is an amenable number.

22091927042025 is a deficient number, since it is larger than the sum of its proper divisors (19165300025878).

22091927042025 is an frugal number, since it uses more digits than its factorization.

22091927042025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1722 (or 858 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 22091927042025 in words is "twenty-two trillion, ninety-one billion, nine hundred twenty-seven million, forty-two thousand, twenty-five".