55450540 has 24 divisors (see below), whose sum is σ = 118186992. Its totient is φ = 21848640.

The previous prime is 55450519. The next prime is 55450559. The reversal of 55450540 is 4505455.

It is a junction number, because it is equal to n+sod(n) for n = 55450499 and 55450508.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19351 + ... + 22030.

It is an arithmetic number, because the mean of its divisors is an integer number (4924458).

Almost surely, 2^55450540 is an apocalyptic number.

It is an amenable number.

55450540 is an abundant number, since it is smaller than the sum of its proper divisors (62736452).

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

55450540 is a wasteful number, since it uses less digits than its factorization.

55450540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41457 (or 41455 counting only the distinct ones).

The product of its (nonzero) digits is 10000, while the sum is 28.

The square root of 55450540 is about 7446.5119351277. The cubic root of 55450540 is about 381.3308369303.

Adding to 55450540 its reverse (4505455), we get a palindrome (59955995).

It can be divided in two parts, 5 and 5450540, that added together give a palindrome (5450545).

The spelling of 55450540 in words is "fifty-five million, four hundred fifty thousand, five hundred forty".