221453532534240 has 144 divisors (see below), whose sum is σ = 757052474160528. Its totient is φ = 58949382985728.

The previous prime is 221453532534149. The next prime is 221453532534251. The reversal of 221453532534240 is 42435235354122.

It is a happy number.

221453532534240 is a `hidden beast` number, since 2 + 2 + 1 + 4 + 5 + 353 + 2 + 53 + 4 + 240 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 135767589 + ... + 137389028.

It is an arithmetic number, because the mean of its divisors is an integer number (5257308848337).

Almost surely, 2^{221453532534240} is an apocalyptic number.

221453532534240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221453532534240 is an abundant number, since it is smaller than the sum of its proper divisors (535598941626288).

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

221453532534240 is a wasteful number, since it uses less digits than its factorization.

221453532534240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273157201 (or 273157190 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 45.

Adding to 221453532534240 its reverse (42435235354122), we get a palindrome (263888767888362).

The spelling of 221453532534240 in words is "two hundred twenty-one trillion, four hundred fifty-three billion, five hundred thirty-two million, five hundred thirty-four thousand, two hundred forty".