938215018225 has 9 divisors (see below), whose sum is σ = 1163392628043. Its totient is φ = 750568140120.

The previous prime is 938215018211. The next prime is 938215018241. The reversal of 938215018225 is 522810512839.

The square root of 938215018225 is 968615.

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., 337757406561 + 600457611664 = 581169^2 + 774892^2 .

It is not a de Polignac number, because 938215018225 - 2¹⁵ = 938214985457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4746214 + ... + 4939936.

Almost surely, 2^938215018225 is an apocalyptic number.

938215018225 is the 968615-th square number.

938215018225 is the 484308-th centered octagonal number.

It is an amenable number.

938215018225 is a deficient number, since it is larger than the sum of its proper divisors (225177609818).

938215018225 is an frugal number, since it uses more digits than its factorization.

938215018225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387456 (or 193728 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 46.

The spelling of 938215018225 in words is "nine hundred thirty-eight billion, two hundred fifteen million, eighteen thousand, two hundred twenty-five".