55445871 has 8 divisors (see below), whose sum is σ = 79614640. Its totient is φ = 34120512.

The previous prime is 55445867. The next prime is 55445953. The reversal of 55445871 is 17854455.

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

It is not a de Polignac number, because 55445871 - 2² = 55445867 is a prime.

It is a super-2 number, since 2×55445871² = 6148489221897282, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39), and also a Moran number because the ratio is a prime number: 1421689 = 55445871 / (5 + 5 + 4 + 4 + 5 + 8 + 7 + 1).

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55445821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 710806 + ... + 710883.

It is an arithmetic number, because the mean of its divisors is an integer number (9951830).

Almost surely, 2^55445871 is an apocalyptic number.

55445871 is a deficient number, since it is larger than the sum of its proper divisors (24168769).

55445871 is a wasteful number, since it uses less digits than its factorization.

55445871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421705.

The product of its digits is 112000, while the sum is 39.

The square root of 55445871 is about 7446.1984260426. The cubic root of 55445871 is about 381.3201337965.

The spelling of 55445871 in words is "fifty-five million, four hundred forty-five thousand, eight hundred seventy-one".