221525632516051 has 4 divisors (see below), whose sum is σ = 221525695438632. Its totient is φ = 221525569593472.

The previous prime is 221525632516043. The next prime is 221525632516079. The reversal of 221525632516051 is 150615236525122.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 221525632516051 - 2³ = 221525632516043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221525632515992 and 221525632516010.

It is not an unprimeable number, because it can be changed into a prime (221525632516091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25846345 + ... + 33332938.

It is an arithmetic number, because the mean of its divisors is an integer number (55381423859658).

Almost surely, 2^{221525632516051} is an apocalyptic number.

221525632516051 is a deficient number, since it is larger than the sum of its proper divisors (62922581).

221525632516051 is an equidigital number, since it uses as much as digits as its factorization.

221525632516051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62922580.

The product of its (nonzero) digits is 1080000, while the sum is 46.

The spelling of 221525632516051 in words is "two hundred twenty-one trillion, five hundred twenty-five billion, six hundred thirty-two million, five hundred sixteen thousand, fifty-one".