55803020 has 48 divisors (see below), whose sum is σ = 144234048. Its totient is φ = 17660160.

The previous prime is 55803017. The next prime is 55803023. The reversal of 55803020 is 2030855.

It is an interprime number because it is at equal distance from previous prime (55803017) and next prime (55803023).

It is a super-2 number, since 2×55803020² = 6227954082240800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (55803023) 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, 13511 + ... + 17150.

It is an arithmetic number, because the mean of its divisors is an integer number (3004876).

Almost surely, 2^55803020 is an apocalyptic number.

It is an amenable number.

55803020 is an abundant number, since it is smaller than the sum of its proper divisors (88431028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55803020 is a wasteful number, since it uses less digits than its factorization.

55803020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30690 (or 30688 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 55803020 is about 7470.1418995893. The cubic root of 55803020 is about 382.1371271991.

Adding to 55803020 its reverse (2030855), we get a palindrome (57833875).

The spelling of 55803020 in words is "fifty-five million, eight hundred three thousand, twenty".