55455961 has 4 divisors (see below), whose sum is σ = 60497424. Its totient is φ = 50414500.

The previous prime is 55455943. The next prime is 55455973. The reversal of 55455961 is 16955455.

55455961 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55455961 - 2²³ = 47067353 is a prime.

It is a super-3 number, since 3×55455961³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55455061) 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 3 ways as a sum of consecutive naturals, for example, 2520715 + ... + 2520736.

It is an arithmetic number, because the mean of its divisors is an integer number (15124356).

Almost surely, 2^55455961 is an apocalyptic number.

It is an amenable number.

55455961 is a deficient number, since it is larger than the sum of its proper divisors (5041463).

55455961 is a wasteful number, since it uses less digits than its factorization.

55455961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5041462.

The product of its digits is 135000, while the sum is 40.

The square root of 55455961 is about 7446.8759221569. The cubic root of 55455961 is about 381.3432631820.

The spelling of 55455961 in words is "fifty-five million, four hundred fifty-five thousand, nine hundred sixty-one".