21501550150143 has 16 divisors (see below), whose sum is σ = 32785122621696. Its totient is φ = 12278779188480.

The previous prime is 21501550150141. The next prime is 21501550150183. The reversal of 21501550150143 is 34105105510512.

It is a happy number.

It is not a de Polignac number, because 21501550150143 - 2¹ = 21501550150141 is a prime.

It is a super-2 number, since 2×21501550150143² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21501550150141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325836946 + ... + 325902927.

It is an arithmetic number, because the mean of its divisors is an integer number (2049070163856).

Almost surely, 2^{21501550150143} is an apocalyptic number.

21501550150143 is a deficient number, since it is larger than the sum of its proper divisors (11283572471553).

21501550150143 is a wasteful number, since it uses less digits than its factorization.

21501550150143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651741454.

The product of its (nonzero) digits is 15000, while the sum is 33.

Adding to 21501550150143 its reverse (34105105510512), we get a palindrome (55606655660655).

The spelling of 21501550150143 in words is "twenty-one trillion, five hundred one billion, five hundred fifty million, one hundred fifty thousand, one hundred forty-three".