21471523241570 has 64 divisors (see below), whose sum is σ = 39459781359360. Its totient is φ = 8410285390848.

The previous prime is 21471523241561. The next prime is 21471523241573. The reversal of 21471523241570 is 7514232517412.

It is a super-2 number, since 2×21471523241570² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21471523241573) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 344987174 + ... + 345049406.

It is an arithmetic number, because the mean of its divisors is an integer number (616559083740).

Almost surely, 2^{21471523241570} is an apocalyptic number.

21471523241570 is a deficient number, since it is larger than the sum of its proper divisors (17988258117790).

21471523241570 is a wasteful number, since it uses less digits than its factorization.

21471523241570 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66059.

The product of its (nonzero) digits is 470400, while the sum is 44.

Adding to 21471523241570 its reverse (7514232517412), we get a palindrome (28985755758982).

The spelling of 21471523241570 in words is "twenty-one trillion, four hundred seventy-one billion, five hundred twenty-three million, two hundred forty-one thousand, five hundred seventy".