216057225525 has 24 divisors (see below), whose sum is σ = 363954517920. Its totient is φ = 113056357440.

The previous prime is 216057225521. The next prime is 216057225539. The reversal of 216057225525 is 525522750612.

It is not a de Polignac number, because 216057225525 - 2² = 216057225521 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216057225521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27173035 + ... + 27180984.

It is an arithmetic number, because the mean of its divisors is an integer number (15164771580).

Almost surely, 2^216057225525 is an apocalyptic number.

216057225525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216057225525 is a deficient number, since it is larger than the sum of its proper divisors (147897292395).

216057225525 is a wasteful number, since it uses less digits than its factorization.

216057225525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54354085 (or 54354080 counting only the distinct ones).

The product of its (nonzero) digits is 420000, while the sum is 42.

The spelling of 216057225525 in words is "two hundred sixteen billion, fifty-seven million, two hundred twenty-five thousand, five hundred twenty-five".