221525107040651 has 8 divisors (see below), whose sum is σ = 225705047212080. Its totient is φ = 217345175060832.

The previous prime is 221525107040639. The next prime is 221525107040669. The reversal of 221525107040651 is 156040701525122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221525107040651 - 2¹⁴ = 221525107024267 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221525107040599 and 221525107040608.

It is not an unprimeable number, because it can be changed into a prime (221525107060651) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 101165876 + ... + 103332398.

It is an arithmetic number, because the mean of its divisors is an integer number (28213130901510).

Almost surely, 2^{221525107040651} is an apocalyptic number.

221525107040651 is a deficient number, since it is larger than the sum of its proper divisors (4179940171429).

221525107040651 is a wasteful number, since it uses less digits than its factorization.

221525107040651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4095805.

The product of its (nonzero) digits is 168000, while the sum is 41.

Adding to 221525107040651 its reverse (156040701525122), we get a palindrome (377565808565773).

The spelling of 221525107040651 in words is "two hundred twenty-one trillion, five hundred twenty-five billion, one hundred seven million, forty thousand, six hundred fifty-one".