221412435765145 has 8 divisors (see below), whose sum is σ = 272175286892040. Its totient is φ = 172809705962880.

The previous prime is 221412435765113. The next prime is 221412435765203. The reversal of 221412435765145 is 541567534214122.

It can be written as a sum of positive squares in 4 ways, for example, as 9687208055184 + 211725227709961 = 3112428^2 + 14550781^2 .

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

It is not a de Polignac number, because 221412435765145 - 2⁵ = 221412435765113 is a prime.

It is a super-2 number, since 2×221412435765145² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221412435765092 and 221412435765101.

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, 540030330930 + ... + 540030331339.

It is an arithmetic number, because the mean of its divisors is an integer number (34021910861505).

Almost surely, 2^{221412435765145} is an apocalyptic number.

It is an amenable number.

221412435765145 is a deficient number, since it is larger than the sum of its proper divisors (50762851126895).

221412435765145 is a wasteful number, since it uses less digits than its factorization.

221412435765145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080060662315.

The product of its digits is 8064000, while the sum is 52.

Adding to 221412435765145 its reverse (541567534214122), we get a palindrome (762979969979267).

The spelling of 221412435765145 in words is "two hundred twenty-one trillion, four hundred twelve billion, four hundred thirty-five million, seven hundred sixty-five thousand, one hundred forty-five".