55420504 has 8 divisors (see below), whose sum is σ = 103913460. Its totient is φ = 27710248.

The previous prime is 55420481. The next prime is 55420517. The reversal of 55420504 is 40502455.

55420504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×55420504² = 6142864527228032, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3463774 + ... + 3463789.

Almost surely, 2^55420504 is an apocalyptic number.

It is an amenable number.

55420504 is a deficient number, since it is larger than the sum of its proper divisors (48492956).

55420504 is a wasteful number, since it uses less digits than its factorization.

55420504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6927569 (or 6927565 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 55420504 is about 7444.4948787678. The cubic root of 55420504 is about 381.2619724270.

Adding to 55420504 its reverse (40502455), we get a palindrome (95922959).

The spelling of 55420504 in words is "fifty-five million, four hundred twenty thousand, five hundred four".