221432145323654 has 32 divisors (see below), whose sum is σ = 334619341056000. Its totient is φ = 109894299200928.

The previous prime is 221432145323497. The next prime is 221432145323677. The reversal of 221432145323654 is 456323541234122.

It is a junction number, because it is equal to n+sod(n) for n = 221432145323599 and 221432145323608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6009484259 + ... + 6009521105.

It is an arithmetic number, because the mean of its divisors is an integer number (10456854408000).

Almost surely, 2^{221432145323654} is an apocalyptic number.

221432145323654 is a deficient number, since it is larger than the sum of its proper divisors (113187195732346).

221432145323654 is a wasteful number, since it uses less digits than its factorization.

221432145323654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62492.

The product of its digits is 4147200, while the sum is 47.

Adding to 221432145323654 its reverse (456323541234122), we get a palindrome (677755686557776).

The spelling of 221432145323654 in words is "two hundred twenty-one trillion, four hundred thirty-two billion, one hundred forty-five million, three hundred twenty-three thousand, six hundred fifty-four".