215541125204 has 12 divisors (see below), whose sum is σ = 377209175700. Its totient is φ = 107767075008.

The previous prime is 215541125153. The next prime is 215541125207. The reversal of 215541125204 is 402521145512.

It can be written as a sum of positive squares in 2 ways, for example, as 90720235204 + 124820890000 = 301198^2 + 353300^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215541125207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 730289 + ... + 982040.

It is an arithmetic number, because the mean of its divisors is an integer number (31434097975).

Almost surely, 2^215541125204 is an apocalyptic number.

It is an amenable number.

215541125204 is a deficient number, since it is larger than the sum of its proper divisors (161668050496).

215541125204 is a wasteful number, since it uses less digits than its factorization.

215541125204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1743802 (or 1743800 counting only the distinct ones).

The product of its (nonzero) digits is 16000, while the sum is 32.

The spelling of 215541125204 in words is "two hundred fifteen billion, five hundred forty-one million, one hundred twenty-five thousand, two hundred four".