56521212007 has 4 divisors (see below), whose sum is σ = 60868997560. Its totient is φ = 52173426456.

The previous prime is 56521212001. The next prime is 56521212017. The reversal of 56521212007 is 70021212565.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 56521212007 - 2²³ = 56512823399 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 56521212007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56521212001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2173892757 + ... + 2173892782.

It is an arithmetic number, because the mean of its divisors is an integer number (15217249390).

Almost surely, 2^56521212007 is an apocalyptic number.

56521212007 is a deficient number, since it is larger than the sum of its proper divisors (4347785553).

56521212007 is a wasteful number, since it uses less digits than its factorization.

56521212007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4347785552.

The product of its (nonzero) digits is 8400, while the sum is 31.

The spelling of 56521212007 in words is "fifty-six billion, five hundred twenty-one million, two hundred twelve thousand, seven".