221454224454 has 16 divisors (see below), whose sum is σ = 442916667648. Its totient is φ = 73816705032.

The previous prime is 221454224419. The next prime is 221454224471. The reversal of 221454224454 is 454422454122.

It is a super-2 number, since 2×221454224454² (a number of 23 digits) contains 22 as substring.

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, 40839 + ... + 666765.

It is an arithmetic number, because the mean of its divisors is an integer number (27682291728).

Almost surely, 2^221454224454 is an apocalyptic number.

221454224454 is an abundant number, since it is smaller than the sum of its proper divisors (221462443194).

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

221454224454 is a wasteful number, since it uses less digits than its factorization.

221454224454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684899.

The product of its digits is 409600, while the sum is 39.

Adding to 221454224454 its reverse (454422454122), we get a palindrome (675876678576).

The spelling of 221454224454 in words is "two hundred twenty-one billion, four hundred fifty-four million, two hundred twenty-four thousand, four hundred fifty-four".