55520004 has 48 divisors (see below), whose sum is σ = 133602560. Its totient is φ = 17936640.

The previous prime is 55519973. The next prime is 55520051. The reversal of 55520004 is 40002555.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52917 + ... + 53955.

Almost surely, 2^55520004 is an apocalyptic number.

It is an amenable number.

55520004 is an abundant number, since it is smaller than the sum of its proper divisors (78082556).

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

55520004 is a wasteful number, since it uses less digits than its factorization.

55520004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1180 (or 1178 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 55520004 is about 7451.1746724929. The cubic root of 55520004 is about 381.4900040725.

Adding to 55520004 its reverse (40002555), we get a palindrome (95522559).

The spelling of 55520004 in words is "fifty-five million, five hundred twenty thousand, four".