21615528032241 has 16 divisors (see below), whose sum is σ = 33859288666560. Its totient is φ = 12092603094720.

The previous prime is 21615528032239. The next prime is 21615528032243. The reversal of 21615528032241 is 14223082551612.

It is an interprime number because it is at equal distance from previous prime (21615528032239) and next prime (21615528032243).

It is not a de Polignac number, because 21615528032241 - 2¹ = 21615528032239 is a prime.

It is a super-2 number, since 2×21615528032241² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21615528032193 and 21615528032202.

It is not an unprimeable number, because it can be changed into a prime (21615528032243) 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, 25192922686 + ... + 25192923543.

It is an arithmetic number, because the mean of its divisors is an integer number (2116205541660).

Almost surely, 2^{21615528032241} is an apocalyptic number.

It is an amenable number.

21615528032241 is a deficient number, since it is larger than the sum of its proper divisors (12243760634319).

21615528032241 is a wasteful number, since it uses less digits than its factorization.

21615528032241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50385846256.

The product of its (nonzero) digits is 230400, while the sum is 42.

The spelling of 21615528032241 in words is "twenty-one trillion, six hundred fifteen billion, five hundred twenty-eight million, thirty-two thousand, two hundred forty-one".