202018786225 has 27 divisors (see below), whose sum is σ = 252223237539. Its totient is φ = 160512940800.

The previous prime is 202018786223. The next prime is 202018786231. The reversal of 202018786225 is 522687810202.

The square root of 202018786225 is 449465.

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

It can be written as a sum of positive squares in 13 ways, for example, as 68103775089 + 133915011136 = 260967^2 + 365944^2 .

It is not a de Polignac number, because 202018786225 - 2¹ = 202018786223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202018786223) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 541605139 + ... + 541605511.

Almost surely, 2^202018786225 is an apocalyptic number.

202018786225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

202018786225 is the 449465-th square number.

202018786225 is the 224733-rd centered octagonal number.

It is an amenable number.

202018786225 is a deficient number, since it is larger than the sum of its proper divisors (50204451314).

202018786225 is an frugal number, since it uses more digits than its factorization.

202018786225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238 (or 619 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 43.

The spelling of 202018786225 in words is "two hundred two billion, eighteen million, seven hundred eighty-six thousand, two hundred twenty-five".