221534404162224 has 40 divisors (see below), whose sum is σ = 572299738381680. Its totient is φ = 73844475241728.

The previous prime is 221534404162213. The next prime is 221534404162277. The reversal of 221534404162224 is 422261404435122.

It is a super-2 number, since 2×221534404162224² (a number of 29 digits) contains 22 as substring.

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, 913914 + ... + 21069030.

It is an arithmetic number, because the mean of its divisors is an integer number (14307493459542).

Almost surely, 2^{221534404162224} is an apocalyptic number.

221534404162224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

221534404162224 is an abundant number, since it is smaller than the sum of its proper divisors (350765334219456).

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

221534404162224 is a wasteful number, since it uses less digits than its factorization.

221534404162224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20384117 (or 20384111 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 42.

Adding to 221534404162224 its reverse (422261404435122), we get a palindrome (643795808597346).

The spelling of 221534404162224 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred four million, one hundred sixty-two thousand, two hundred twenty-four".