21575057512 has 16 divisors (see below), whose sum is σ = 40512471840. Its totient is φ = 10771731696.

The previous prime is 21575057477. The next prime is 21575057557.

It is a happy number.

21575057512 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×21575057512² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1968828 + ... + 1979755.

It is an arithmetic number, because the mean of its divisors is an integer number (2532029490).

Almost surely, 2^21575057512 is an apocalyptic number.

It is an amenable number.

21575057512 is a deficient number, since it is larger than the sum of its proper divisors (18937414328).

21575057512 is a wasteful number, since it uses less digits than its factorization.

21575057512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3949272 (or 3949268 counting only the distinct ones).

The product of its (nonzero) digits is 122500, while the sum is 40.

The spelling of 21575057512 in words is "twenty-one billion, five hundred seventy-five million, fifty-seven thousand, five hundred twelve".