165267222525 has 36 divisors (see below), whose sum is σ = 313424433972. Its totient is φ = 82957662720.

The previous prime is 165267222517. The next prime is 165267222539. The reversal of 165267222525 is 525222762561.

165267222525 is a `hidden beast` number, since 1 + 6 + 52 + 6 + 72 + 2 + 2 + 525 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 9871217316 + 155396005209 = 99354^2 + 394203^2 .

It is not a de Polignac number, because 165267222525 - 2³ = 165267222517 is a prime.

It is a super-2 number, since 2×165267222525² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 21599734 + ... + 21607383.

It is an arithmetic number, because the mean of its divisors is an integer number (8706234277).

Almost surely, 2^165267222525 is an apocalyptic number.

165267222525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165267222525 is a deficient number, since it is larger than the sum of its proper divisors (148157211447).

165267222525 is a wasteful number, since it uses less digits than its factorization.

165267222525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43207150 (or 43207142 counting only the distinct ones).

The product of its digits is 1008000, while the sum is 45.

The spelling of 165267222525 in words is "one hundred sixty-five billion, two hundred sixty-seven million, two hundred twenty-two thousand, five hundred twenty-five".