55543961 has 16 divisors (see below), whose sum is σ = 63244800. Its totient is φ = 48719440.

The previous prime is 55543937. The next prime is 55543997. The reversal of 55543961 is 16934555.

55543961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-55543961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55543861) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 37880 + ... + 39318.

It is an arithmetic number, because the mean of its divisors is an integer number (3952800).

Almost surely, 2^55543961 is an apocalyptic number.

It is an amenable number.

55543961 is a deficient number, since it is larger than the sum of its proper divisors (7700839).

55543961 is a wasteful number, since it uses less digits than its factorization.

55543961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501 (or 1479 counting only the distinct ones).

The product of its digits is 81000, while the sum is 38.

The square root of 55543961 is about 7452.7820979819. The cubic root of 55543961 is about 381.5448674318.

The spelling of 55543961 in words is "fifty-five million, five hundred forty-three thousand, nine hundred sixty-one".