221320454151 has 8 divisors (see below), whose sum is σ = 301372533504. Its totient is φ = 144407672120.

The previous prime is 221320454149. The next prime is 221320454153. The reversal of 221320454151 is 151454023122.

It is an interprime number because it is at equal distance from previous prime (221320454149) and next prime (221320454153).

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

It is a cyclic number.

It is not a de Polignac number, because 221320454151 - 2¹ = 221320454149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221320454153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 784824165 + ... + 784824446.

It is an arithmetic number, because the mean of its divisors is an integer number (37671566688).

Almost surely, 2^221320454151 is an apocalyptic number.

221320454151 is a deficient number, since it is larger than the sum of its proper divisors (80052079353).

221320454151 is a wasteful number, since it uses less digits than its factorization.

221320454151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1569648661.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 221320454151 its reverse (151454023122), we get a palindrome (372774477273).

The spelling of 221320454151 in words is "two hundred twenty-one billion, three hundred twenty million, four hundred fifty-four thousand, one hundred fifty-one".