215204553425 has 24 divisors (see below), whose sum is σ = 268773243840. Its totient is φ = 170928273600.

The previous prime is 215204553419. The next prime is 215204553433. The reversal of 215204553425 is 524355402512.

It is not a de Polignac number, because 215204553425 - 2¹⁶ = 215204487889 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2785619 + ... + 2861831.

It is an arithmetic number, because the mean of its divisors is an integer number (11198885160).

Almost surely, 2^215204553425 is an apocalyptic number.

215204553425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

215204553425 is a deficient number, since it is larger than the sum of its proper divisors (53568690415).

215204553425 is a wasteful number, since it uses less digits than its factorization.

215204553425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77033 (or 77028 counting only the distinct ones).

The product of its (nonzero) digits is 240000, while the sum is 38.

Adding to 215204553425 its reverse (524355402512), we get a palindrome (739559955937).

The spelling of 215204553425 in words is "two hundred fifteen billion, two hundred four million, five hundred fifty-three thousand, four hundred twenty-five".