55603345 has 32 divisors (see below), whose sum is σ = 81554688.
Its totient is φ = 35524608.
The previous prime is 55603321. The next prime is 55603349. The reversal of 55603345 is 54330655.
It is not a de Polignac number, because 55603345 - 25 = 55603313 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (55603349) by changing a digit.
It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66822 + ... + 67648.
It is an arithmetic number, because the mean of its divisors is an integer number (2548584).
Almost surely, 255603345 is an apocalyptic number.
It is an amenable number.
55603345 is a deficient number, since it is larger than the sum of its proper divisors (25951343).
55603345 is a wasteful number, since it uses less digits than its factorization.
55603345 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 969.
The product of its (nonzero) digits is 27000, while the sum is 31.
The square root of 55603345 is about 7456.7650492690.
The cubic root of 55603345 is about 381.6807933428.
The spelling of 55603345 in words is "fifty-five million, six hundred three thousand, three hundred forty-five".