221325134534 has 32 divisors (see below), whose sum is σ = 390917199936. Its totient is φ = 92020561920.

The previous prime is 221325134519. The next prime is 221325134561. The reversal of 221325134534 is 435431523122.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 221325134494 and 221325134503.

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, 1712747 + ... + 1837430.

It is an arithmetic number, because the mean of its divisors is an integer number (12216162498).

Almost surely, 2^221325134534 is an apocalyptic number.

221325134534 is a deficient number, since it is larger than the sum of its proper divisors (169592065402).

221325134534 is a wasteful number, since it uses less digits than its factorization.

221325134534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3550320.

The product of its digits is 86400, while the sum is 35.

Adding to 221325134534 its reverse (435431523122), we get a palindrome (656756657656).

The spelling of 221325134534 in words is "two hundred twenty-one billion, three hundred twenty-five million, one hundred thirty-four thousand, five hundred thirty-four".