30812536225 has 9 divisors (see below), whose sum is σ = 38208633267. Its totient is φ = 24649326840.

The previous prime is 30812536199. The next prime is 30812536229. The reversal of 30812536225 is 52263521803.

The square root of 30812536225 is 175535.

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

It can be written as a sum of positive squares in only one way, i.e., 11092513041 + 19720023184 = 105321^2 + 140428^2 .

It is not a de Polignac number, because 30812536225 - 2¹⁷ = 30812405153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30812536229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 860122 + ... + 895228.

Almost surely, 2^30812536225 is an apocalyptic number.

30812536225 is the 175535-th square number.

30812536225 is the 87768-th centered octagonal number.

It is an amenable number.

30812536225 is a deficient number, since it is larger than the sum of its proper divisors (7396097042).

30812536225 is an frugal number, since it uses more digits than its factorization.

30812536225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70224 (or 35112 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 30812536225 in words is "thirty billion, eight hundred twelve million, five hundred thirty-six thousand, two hundred twenty-five".