221771157056652 has 72 divisors (see below), whose sum is σ = 601953498503280. Its totient is φ = 63362849303040.

The previous prime is 221771157056641. The next prime is 221771157056677. The reversal of 221771157056652 is 256650751177122.

It is a super-2 number, since 2×221771157056652² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221771157056592 and 221771157056601.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 121923952 + ... + 123729512.

It is an arithmetic number, because the mean of its divisors is an integer number (8360465256990).

Almost surely, 2^{221771157056652} is an apocalyptic number.

It is an amenable number.

221771157056652 is an abundant number, since it is smaller than the sum of its proper divisors (380182341446628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221771157056652 is a wasteful number, since it uses less digits than its factorization.

221771157056652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2014471 (or 2014462 counting only the distinct ones).

The product of its (nonzero) digits is 12348000, while the sum is 57.

The spelling of 221771157056652 in words is "two hundred twenty-one trillion, seven hundred seventy-one billion, one hundred fifty-seven million, fifty-six thousand, six hundred fifty-two".