55013985 has 80 divisors (see below), whose sum is σ = 109120704. Its totient is φ = 26453952.

The previous prime is 55013983. The next prime is 55014049. The reversal of 55013985 is 58931055.

It is a happy number.

55013985 is a `hidden beast` number, since 550 + 13 + 98 + 5 = 666.

55013985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55013985 - 2¹ = 55013983 is a prime.

It is a super-3 number, since 3×55013985³ (a number of 24 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55013983) 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 79 ways as a sum of consecutive naturals, for example, 1279374 + ... + 1279416.

Almost surely, 2^55013985 is an apocalyptic number.

It is an amenable number.

55013985 is a deficient number, since it is larger than the sum of its proper divisors (54106719).

55013985 is an frugal number, since it uses more digits than its factorization.

55013985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88 (or 64 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

The square root of 55013985 is about 7417.1412956745. The cubic root of 55013985 is about 380.3274762477.

It can be divided in two parts, 550 and 13985, that added together give a triangular number (14535 = T₁₇₀).

The spelling of 55013985 in words is "fifty-five million, thirteen thousand, nine hundred eighty-five".