55955531 has 4 divisors (see below), whose sum is σ = 56088864. Its totient is φ = 55822200.

The previous prime is 55955509. The next prime is 55955533. The reversal of 55955531 is 13555955.

55955531 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.

It is a cyclic number.

It is not a de Polignac number, because 55955531 - 2⁶ = 55955467 is a prime.

It is a super-3 number, since 3×55955531³ (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 (55955533) 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, 66035 + ... + 66876.

It is an arithmetic number, because the mean of its divisors is an integer number (14022216).

Almost surely, 2^55955531 is an apocalyptic number.

55955531 is a deficient number, since it is larger than the sum of its proper divisors (133333).

55955531 is a wasteful number, since it uses less digits than its factorization.

55955531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133332.

The product of its digits is 84375, while the sum is 38.

The square root of 55955531 is about 7480.3429734204. The cubic root of 55955531 is about 382.4849405266.

The spelling of 55955531 in words is "fifty-five million, nine hundred fifty-five thousand, five hundred thirty-one".