1225172500165 has 8 divisors (see below), whose sum is σ = 1471319958168. Its totient is φ = 979396028160.

The previous prime is 1225172500157. The next prime is 1225172500171. The reversal of 1225172500165 is 5610052715221.

It can be written as a sum of positive squares in 4 ways, for example, as 220915980289 + 1004256519876 = 470017^2 + 1002126^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1225172500165 - 2³ = 1225172500157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92739232 + ... + 92752441.

It is an arithmetic number, because the mean of its divisors is an integer number (183914994771).

Almost surely, 2^{1225172500165} is an apocalyptic number.

It is an amenable number.

1225172500165 is a deficient number, since it is larger than the sum of its proper divisors (246147458003).

1225172500165 is a wasteful number, since it uses less digits than its factorization.

1225172500165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185492999.

The product of its (nonzero) digits is 42000, while the sum is 37.

The spelling of 1225172500165 in words is "one trillion, two hundred twenty-five billion, one hundred seventy-two million, five hundred thousand, one hundred sixty-five".