55503145 has 8 divisors (see below), whose sum is σ = 68404104. Its totient is φ = 43202304.

The previous prime is 55503143. The next prime is 55503157. The reversal of 55503145 is 54130555.

It can be written as a sum of positive squares in 4 ways, for example, as 9412624 + 46090521 = 3068^2 + 6789^2 .

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 55503145 - 2¹ = 55503143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55503143) 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, 149824 + ... + 150193.

It is an arithmetic number, because the mean of its divisors is an integer number (8550513).

Almost surely, 2^55503145 is an apocalyptic number.

It is an amenable number.

55503145 is a deficient number, since it is larger than the sum of its proper divisors (12900959).

55503145 is a wasteful number, since it uses less digits than its factorization.

55503145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300059.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 55503145 is about 7450.0432884648. The cubic root of 55503145 is about 381.4513862133.

The spelling of 55503145 in words is "fifty-five million, five hundred three thousand, one hundred forty-five".