221513511151 has 8 divisors (see below), whose sum is σ = 221739409008. Its totient is φ = 221287704000.

The previous prime is 221513511113. The next prime is 221513511157. The reversal of 221513511151 is 151115315122.

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 221513511151 - 2¹¹ = 221513509103 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 (221513511157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5542821 + ... + 5582641.

It is an arithmetic number, because the mean of its divisors is an integer number (27717426126).

Almost surely, 2^221513511151 is an apocalyptic number.

221513511151 is a deficient number, since it is larger than the sum of its proper divisors (225897857).

221513511151 is a wasteful number, since it uses less digits than its factorization.

221513511151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45353.

The product of its digits is 1500, while the sum is 28.

Adding to 221513511151 its reverse (151115315122), we get a palindrome (372628826273).

The spelling of 221513511151 in words is "two hundred twenty-one billion, five hundred thirteen million, five hundred eleven thousand, one hundred fifty-one".