55505050 has 24 divisors (see below), whose sum is σ = 103476636. Its totient is φ = 22151040.

The previous prime is 55505029. The next prime is 55505071. The reversal of 55505050 is 5050555.

It is an interprime number because it is at equal distance from previous prime (55505029) and next prime (55505071).

It can be written as a sum of positive squares in 6 ways, for example, as 13786369 + 41718681 = 3713^2 + 6459^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26854 + ... + 28846.

Almost surely, 2^55505050 is an apocalyptic number.

55505050 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55505050 is a deficient number, since it is larger than the sum of its proper divisors (47971586).

55505050 is a wasteful number, since it uses less digits than its factorization.

55505050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562 (or 2557 counting only the distinct ones).

The product of its (nonzero) digits is 3125, while the sum is 25.

The square root of 55505050 is about 7450.1711389739. The cubic root of 55505050 is about 381.4557502698.

It can be divided in two parts, 5 and 5505050, that added together give a palindrome (5505055).

The spelling of 55505050 in words is "fifty-five million, five hundred five thousand, fifty".