56121812 has 6 divisors (see below), whose sum is σ = 98213178. Its totient is φ = 28060904.

The previous prime is 56121809. The next prime is 56121823. The reversal of 56121812 is 21812165.

56121812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 56010256 + 111556 = 7484^2 + 334^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7015223 + ... + 7015230.

It is an arithmetic number, because the mean of its divisors is an integer number (16368863).

Almost surely, 2^56121812 is an apocalyptic number.

It is an amenable number.

56121812 is a deficient number, since it is larger than the sum of its proper divisors (42091366).

56121812 is a wasteful number, since it uses less digits than its factorization.

56121812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14030457 (or 14030455 counting only the distinct ones).

The product of its digits is 960, while the sum is 26.

The square root of 56121812 is about 7491.4492589885. The cubic root of 56121812 is about 382.8634380098.

Adding to 56121812 its reverse (21812165), we get a palindrome (77933977).

The spelling of 56121812 in words is "fifty-six million, one hundred twenty-one thousand, eight hundred twelve".