55003645 has 8 divisors (see below), whose sum is σ = 67788504. Its totient is φ = 42813504.

The previous prime is 55003643. The next prime is 55003667. The reversal of 55003645 is 54630055.

It can be written as a sum of positive squares in 4 ways, for example, as 4280761 + 50722884 = 2069^2 + 7122^2 .

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 55003645 - 2¹ = 55003643 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55003643) 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, 148474 + ... + 148843.

It is an arithmetic number, because the mean of its divisors is an integer number (8473563).

Almost surely, 2^55003645 is an apocalyptic number.

It is an amenable number.

55003645 is a deficient number, since it is larger than the sum of its proper divisors (12784859).

55003645 is a wasteful number, since it uses less digits than its factorization.

55003645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297359.

The product of its (nonzero) digits is 9000, while the sum is 28.

The square root of 55003645 is about 7416.4442288741. Note that the first 3 decimals coincide. The cubic root of 55003645 is about 380.3036469583.

The spelling of 55003645 in words is "fifty-five million, three thousand, six hundred forty-five".