221135383453 has 4 divisors (see below), whose sum is σ = 221151413440. Its totient is φ = 221119353468.

The previous prime is 221135383367. The next prime is 221135383463. The reversal of 221135383453 is 354383531122.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-221135383453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221135383463) 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, 7994283 + ... + 8021896.

It is an arithmetic number, because the mean of its divisors is an integer number (55287853360).

Almost surely, 2^221135383453 is an apocalyptic number.

It is an amenable number.

221135383453 is a deficient number, since it is larger than the sum of its proper divisors (16029987).

221135383453 is a wasteful number, since it uses less digits than its factorization.

221135383453 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16029986.

The product of its digits is 259200, while the sum is 40.

The spelling of 221135383453 in words is "two hundred twenty-one billion, one hundred thirty-five million, three hundred eighty-three thousand, four hundred fifty-three".