221652227172651 has 8 divisors (see below), whose sum is σ = 322403239523904. Its totient is φ = 134334683134920.

The previous prime is 221652227172637. The next prime is 221652227172653. The reversal of 221652227172651 is 156271722256122.

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

It is not a de Polignac number, because 221652227172651 - 2¹⁴ = 221652227156267 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221652227172594 and 221652227172603.

It is not an unprimeable number, because it can be changed into a prime (221652227172653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3358367078341 + ... + 3358367078406.

It is an arithmetic number, because the mean of its divisors is an integer number (40300404940488).

Almost surely, 2^{221652227172651} is an apocalyptic number.

221652227172651 is a deficient number, since it is larger than the sum of its proper divisors (100751012351253).

221652227172651 is a wasteful number, since it uses less digits than its factorization.

221652227172651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6716734156761.

The product of its digits is 2822400, while the sum is 51.

The spelling of 221652227172651 in words is "two hundred twenty-one trillion, six hundred fifty-two billion, two hundred twenty-seven million, one hundred seventy-two thousand, six hundred fifty-one".