221524240340053 has 4 divisors (see below), whose sum is σ = 253170560388640. Its totient is φ = 189877920291468.

The previous prime is 221524240340041. The next prime is 221524240340099. The reversal of 221524240340053 is 350043042425122.

It is a happy number.

221524240340053 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 221524240340053 - 2²⁵ = 221524206785621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221524240339994 and 221524240340021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221524240343053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15823160024283 + ... + 15823160024296.

It is an arithmetic number, because the mean of its divisors is an integer number (63292640097160).

Almost surely, 2^{221524240340053} is an apocalyptic number.

It is an amenable number.

221524240340053 is a deficient number, since it is larger than the sum of its proper divisors (31646320048587).

221524240340053 is an equidigital number, since it uses as much as digits as its factorization.

221524240340053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31646320048586.

The product of its (nonzero) digits is 230400, while the sum is 37.

Adding to 221524240340053 its reverse (350043042425122), we get a palindrome (571567282765175).

The spelling of 221524240340053 in words is "two hundred twenty-one trillion, five hundred twenty-four billion, two hundred forty million, three hundred forty thousand, fifty-three".