215355553523 has 12 divisors (see below), whose sum is σ = 249171717480. Its totient is φ = 185473680480.

The previous prime is 215355553451. The next prime is 215355553537. The reversal of 215355553523 is 325355553512.

215355553523 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 215355553523 - 2¹⁴ = 215355537139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215355553573) 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 11 ways as a sum of consecutive naturals, for example, 46834490 + ... + 46839087.

It is an arithmetic number, because the mean of its divisors is an integer number (20764309790).

Almost surely, 2^215355553523 is an apocalyptic number.

215355553523 is a deficient number, since it is larger than the sum of its proper divisors (33816163957).

215355553523 is a wasteful number, since it uses less digits than its factorization.

215355553523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93673618 (or 93673607 counting only the distinct ones).

The product of its digits is 1687500, while the sum is 44.

The spelling of 215355553523 in words is "two hundred fifteen billion, three hundred fifty-five million, five hundred fifty-three thousand, five hundred twenty-three".