55446981 has 8 divisors (see below), whose sum is σ = 75502464. Its totient is φ = 36178080.

The previous prime is 55446973. The next prime is 55446983. The reversal of 55446981 is 18964455.

55446981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55446981 - 2³ = 55446973 is a prime.

It is a super-2 number, since 2×55446981² = 6148735404028722, which contains 22 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 (55446983) 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 7 ways as a sum of consecutive naturals, for example, 196480 + ... + 196761.

It is an arithmetic number, because the mean of its divisors is an integer number (9437808).

Almost surely, 2^55446981 is an apocalyptic number.

It is an amenable number.

55446981 is a deficient number, since it is larger than the sum of its proper divisors (20055483).

55446981 is a wasteful number, since it uses less digits than its factorization.

55446981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393291.

The product of its digits is 172800, while the sum is 42.

The square root of 55446981 is about 7446.2729603473. The cubic root of 55446981 is about 381.3226783955.

The spelling of 55446981 in words is "fifty-five million, four hundred forty-six thousand, nine hundred eighty-one".