221053164501566 has 16 divisors (see below), whose sum is σ = 357157427079168. Its totient is φ = 102310721297400.

The previous prime is 221053164501527. The next prime is 221053164501571. The reversal of 221053164501566 is 665105461350122.

It is a happy number.

It is a super-2 number, since 2×221053164501566² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 221053164501566.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77508120770 + ... + 77508123621.

It is an arithmetic number, because the mean of its divisors is an integer number (22322339192448).

Almost surely, 2^{221053164501566} is an apocalyptic number.

221053164501566 is a deficient number, since it is larger than the sum of its proper divisors (136104262577602).

221053164501566 is a wasteful number, since it uses less digits than its factorization.

221053164501566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155016244447.

The product of its (nonzero) digits is 1296000, while the sum is 47.

The spelling of 221053164501566 in words is "two hundred twenty-one trillion, fifty-three billion, one hundred sixty-four million, five hundred one thousand, five hundred sixty-six".