55551443 has 4 divisors (see below), whose sum is σ = 57467040. Its totient is φ = 53635848.

The previous prime is 55551437. The next prime is 55551449. The reversal of 55551443 is 34415555.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (55551437) and next prime (55551449).

It is not a de Polignac number, because 55551443 - 2¹⁶ = 55485907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55551449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 957755 + ... + 957812.

It is an arithmetic number, because the mean of its divisors is an integer number (14366760).

Almost surely, 2^55551443 is an apocalyptic number.

55551443 is a deficient number, since it is larger than the sum of its proper divisors (1915597).

55551443 is a wasteful number, since it uses less digits than its factorization.

55551443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1915596.

The product of its digits is 30000, while the sum is 32.

The square root of 55551443 is about 7453.2840412801. The cubic root of 55551443 is about 381.5619985503.

Adding to 55551443 its reverse (34415555), we get a palindrome (89966998).

The spelling of 55551443 in words is "fifty-five million, five hundred fifty-one thousand, four hundred forty-three".