21470615311471 has 8 divisors (see below), whose sum is σ = 22733825176944. Its totient is φ = 20207431278720.

The previous prime is 21470615311459. The next prime is 21470615311477. The reversal of 21470615311471 is 17411351607412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21470615311471 - 2¹⁹ = 21470614787183 is a prime.

It is a super-3 number, since 3×21470615311471³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21470615311477) 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, 4733845 + ... + 8083966.

It is an arithmetic number, because the mean of its divisors is an integer number (2841728147118).

Almost surely, 2^{21470615311471} is an apocalyptic number.

21470615311471 is a deficient number, since it is larger than the sum of its proper divisors (1263209865473).

21470615311471 is a wasteful number, since it uses less digits than its factorization.

21470615311471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12916361.

The product of its (nonzero) digits is 141120, while the sum is 43.

Adding to 21470615311471 its reverse (17411351607412), we get a palindrome (38881966918883).

The spelling of 21470615311471 in words is "twenty-one trillion, four hundred seventy billion, six hundred fifteen million, three hundred eleven thousand, four hundred seventy-one".