55551445 has 8 divisors (see below), whose sum is σ = 67149144. Its totient is φ = 44116224.

The previous prime is 55551437. The next prime is 55551449. The reversal of 55551445 is 54415555.

It can be written as a sum of positive squares in 4 ways, for example, as 22212369 + 33339076 = 4713^2 + 5774^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 55551445 - 2³ = 55551437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55551445.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 39864 + ... + 41233.

It is an arithmetic number, because the mean of its divisors is an integer number (8393643).

Almost surely, 2^55551445 is an apocalyptic number.

It is an amenable number.

55551445 is a deficient number, since it is larger than the sum of its proper divisors (11597699).

55551445 is a wasteful number, since it uses less digits than its factorization.

55551445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81239.

The product of its digits is 50000, while the sum is 34.

The square root of 55551445 is about 7453.2841754491. The cubic root of 55551445 is about 381.5620031294.

The spelling of 55551445 in words is "fifty-five million, five hundred fifty-one thousand, four hundred forty-five".