221432145631374 has 8 divisors (see below), whose sum is σ = 442864291262760. Its totient is φ = 73810715210456.

The previous prime is 221432145631337. The next prime is 221432145631447. The reversal of 221432145631374 is 473136541234122.

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

221432145631374 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18452678802609 + ... + 18452678802620.

It is an arithmetic number, because the mean of its divisors is an integer number (55358036407845).

Almost surely, 2^{221432145631374} is an apocalyptic number.

221432145631374 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221432145631374 is a wasteful number, since it uses less digits than its factorization.

221432145631374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36905357605234.

The product of its digits is 2903040, while the sum is 48.

Adding to 221432145631374 its reverse (473136541234122), we get a palindrome (694568686865496).

The spelling of 221432145631374 in words is "two hundred twenty-one trillion, four hundred thirty-two billion, one hundred forty-five million, six hundred thirty-one thousand, three hundred seventy-four".