221534462021445 has 12 divisors (see below), whose sum is σ = 383993067503916. Its totient is φ = 118151713078080.

The previous prime is 221534462021399. The next prime is 221534462021449. The reversal of 221534462021445 is 544120264435122.

221534462021445 is a `hidden beast` number, since 2 + 2 + 1 + 5 + 3 + 4 + 4 + 620 + 2 + 14 + 4 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 35234647630884 + 186299814390561 = 5935878^2 + 13649169^2 .

It is not a de Polignac number, because 221534462021445 - 2¹¹ = 221534462019397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 4922988044921 = 221534462021445 / (2 + 2 + 1 + 5 + 3 + 4 + 4 + 6 + 2 + 0 + 2 + 1 + 4 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 221534462021445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221534462021449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2461494022416 + ... + 2461494022505.

It is an arithmetic number, because the mean of its divisors is an integer number (31999422291993).

Almost surely, 2^{221534462021445} is an apocalyptic number.

It is an amenable number.

221534462021445 is a deficient number, since it is larger than the sum of its proper divisors (162458605482471).

221534462021445 is a wasteful number, since it uses less digits than its factorization.

221534462021445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4922988044932 (or 4922988044929 counting only the distinct ones).

The product of its (nonzero) digits is 1843200, while the sum is 45.

The spelling of 221534462021445 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred sixty-two million, twenty-one thousand, four hundred forty-five".