221432161241455 has 8 divisors (see below), whose sum is σ = 265718775325104. Its totient is φ = 177145607769600.

The previous prime is 221432161241411. The next prime is 221432161241503. The reversal of 221432161241455 is 554142161234122.

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

It is not a de Polignac number, because 221432161241455 - 2¹¹ = 221432161239407 is a prime.

It is a Duffinian number.

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, 6685581 + ... + 22080790.

It is an arithmetic number, because the mean of its divisors is an integer number (33214846915638).

Almost surely, 2^{221432161241455} is an apocalyptic number.

221432161241455 is a deficient number, since it is larger than the sum of its proper divisors (44286614083649).

221432161241455 is a wasteful number, since it uses less digits than its factorization.

221432161241455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30305897.

The product of its digits is 460800, while the sum is 43.

The spelling of 221432161241455 in words is "two hundred twenty-one trillion, four hundred thirty-two billion, one hundred sixty-one million, two hundred forty-one thousand, four hundred fifty-five".