221240024452 has 12 divisors (see below), whose sum is σ = 394475138316. Its totient is φ = 108532842080.

The previous prime is 221240024443. The next prime is 221240024503. The reversal of 221240024452 is 254420042122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 178036739136 + 43203285316 = 421944^2 + 207854^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221240024452.

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, 521792299 + ... + 521792722.

It is an arithmetic number, because the mean of its divisors is an integer number (32872928193).

Almost surely, 2^221240024452 is an apocalyptic number.

It is an amenable number.

221240024452 is a deficient number, since it is larger than the sum of its proper divisors (173235113864).

221240024452 is a wasteful number, since it uses less digits than its factorization.

221240024452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1043585078 (or 1043585076 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 28.

Adding to 221240024452 its reverse (254420042122), we get a palindrome (475660066574).

The spelling of 221240024452 in words is "two hundred twenty-one billion, two hundred forty million, twenty-four thousand, four hundred fifty-two".