221516622043 has 4 divisors (see below), whose sum is σ = 221518130848. Its totient is φ = 221515113240.

The previous prime is 221516622031. The next prime is 221516622053. The reversal of 221516622043 is 340226615122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 340226615122 = 2 ⋅170113307561.

It is a cyclic number.

It is not a de Polignac number, because 221516622043 - 2¹⁷ = 221516490971 is a prime.

It is a super-2 number, since 2×221516622043² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221516622053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 507171 + ... + 836812.

It is an arithmetic number, because the mean of its divisors is an integer number (55379532712).

Almost surely, 2^221516622043 is an apocalyptic number.

221516622043 is a deficient number, since it is larger than the sum of its proper divisors (1508805).

221516622043 is a wasteful number, since it uses less digits than its factorization.

221516622043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508804.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 221516622043 in words is "two hundred twenty-one billion, five hundred sixteen million, six hundred twenty-two thousand, forty-three".