55031603 has 16 divisors (see below), whose sum is σ = 62871552. Its totient is φ = 47712000.

The previous prime is 55031597. The next prime is 55031609. The reversal of 55031603 is 30613055.

It is an interprime number because it is at equal distance from previous prime (55031597) and next prime (55031609).

It is not a de Polignac number, because 55031603 - 2²² = 50837299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55031609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23075 + ... + 25347.

It is an arithmetic number, because the mean of its divisors is an integer number (3929472).

Almost surely, 2^55031603 is an apocalyptic number.

55031603 is a deficient number, since it is larger than the sum of its proper divisors (7839949).

55031603 is a wasteful number, since it uses less digits than its factorization.

55031603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 55031603 is about 7418.3288549376. The cubic root of 55031603 is about 380.3680713456.

Adding to 55031603 its reverse (30613055), we get a palindrome (85644658).

The spelling of 55031603 in words is "fifty-five million, thirty-one thousand, six hundred three".