21224032514254 has 8 divisors (see below), whose sum is σ = 31885254412848. Its totient is φ = 10595614376640.

The previous prime is 21224032514203. The next prime is 21224032514327. The reversal of 21224032514254 is 45241523042212.

It is a happy number.

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

It is a super-2 number, since 2×21224032514254² (a number of 27 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 3 ways as a sum of consecutive naturals, for example, 8200938627 + ... + 8200941214.

It is an arithmetic number, because the mean of its divisors is an integer number (3985656801606).

Almost surely, 2^{21224032514254} is an apocalyptic number.

21224032514254 is a deficient number, since it is larger than the sum of its proper divisors (10661221898594).

21224032514254 is a wasteful number, since it uses less digits than its factorization.

21224032514254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16401880490.

The product of its (nonzero) digits is 153600, while the sum is 37.

Adding to 21224032514254 its reverse (45241523042212), we get a palindrome (66465555556466).

The spelling of 21224032514254 in words is "twenty-one trillion, two hundred twenty-four billion, thirty-two million, five hundred fourteen thousand, two hundred fifty-four".