21535140143150 has 12 divisors (see below), whose sum is σ = 40055360666352. Its totient is φ = 8614056057240.

The previous prime is 21535140143129. The next prime is 21535140143189. The reversal of 21535140143150 is 5134104153512.

It is a happy number.

It is a super-2 number, since 2×21535140143150² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21535140143150.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 215351401382 + ... + 215351401481.

It is an arithmetic number, because the mean of its divisors is an integer number (3337946722196).

Almost surely, 2^{21535140143150} is an apocalyptic number.

21535140143150 is a deficient number, since it is larger than the sum of its proper divisors (18520220523202).

21535140143150 is a wasteful number, since it uses less digits than its factorization.

21535140143150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430702802875 (or 430702802870 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 35.

Adding to 21535140143150 its reverse (5134104153512), we get a palindrome (26669244296662).

The spelling of 21535140143150 in words is "twenty-one trillion, five hundred thirty-five billion, one hundred forty million, one hundred forty-three thousand, one hundred fifty".