21615151100043 has 8 divisors (see below), whose sum is σ = 28868315328000. Its totient is φ = 14386043802728.

The previous prime is 21615151100033. The next prime is 21615151100071. The reversal of 21615151100043 is 34000115151612.

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 21615151100043 - 2¹³ = 21615151091851 is a prime.

It is a super-2 number, since 2×21615151100043² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21615151100033) 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, 6014230563 + ... + 6014234156.

It is an arithmetic number, because the mean of its divisors is an integer number (3608539416000).

Almost surely, 2^{21615151100043} is an apocalyptic number.

21615151100043 is a deficient number, since it is larger than the sum of its proper divisors (7253164227957).

21615151100043 is a wasteful number, since it uses less digits than its factorization.

21615151100043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12028465321.

The product of its (nonzero) digits is 3600, while the sum is 30.

Adding to 21615151100043 its reverse (34000115151612), we get a palindrome (55615266251655).

The spelling of 21615151100043 in words is "twenty-one trillion, six hundred fifteen billion, one hundred fifty-one million, one hundred thousand, forty-three".