55561933 has 12 divisors (see below), whose sum is σ = 68436252. Its totient is φ = 44822400.

The previous prime is 55561921. The next prime is 55561937. The reversal of 55561933 is 33916555.

It can be written as a sum of positive squares in 2 ways, for example, as 29735209 + 25826724 = 5453^2 + 5082^2 .

It is not a de Polignac number, because 55561933 - 2¹³ = 55553741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55561892 and 55561901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55561937) 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 11 ways as a sum of consecutive naturals, for example, 32518 + ... + 34183.

It is an arithmetic number, because the mean of its divisors is an integer number (5703021).

Almost surely, 2^55561933 is an apocalyptic number.

It is an amenable number.

55561933 is a deficient number, since it is larger than the sum of its proper divisors (12874319).

55561933 is a wasteful number, since it uses less digits than its factorization.

55561933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66732 (or 66725 counting only the distinct ones).

The product of its digits is 60750, while the sum is 37.

The square root of 55561933 is about 7453.9877247015. The cubic root of 55561933 is about 381.5860143288.

The spelling of 55561933 in words is "fifty-five million, five hundred sixty-one thousand, nine hundred thirty-three".