221533733006456 has 32 divisors (see below), whose sum is σ = 447328343229600. Its totient is φ = 102246198168960.

The previous prime is 221533733006329. The next prime is 221533733006459. The reversal of 221533733006456 is 654600337335122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221533733006459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147932450 + ... + 149422478.

It is an arithmetic number, because the mean of its divisors is an integer number (13979010725925).

Almost surely, 2^{221533733006456} is an apocalyptic number.

221533733006456 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

221533733006456 is an abundant number, since it is smaller than the sum of its proper divisors (225794610223144).

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

221533733006456 is a wasteful number, since it uses less digits than its factorization.

221533733006456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2919639 (or 2919635 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 50.

The spelling of 221533733006456 in words is "two hundred twenty-one trillion, five hundred thirty-three billion, seven hundred thirty-three million, six thousand, four hundred fifty-six".