55511004 has 12 divisors (see below), whose sum is σ = 129525704. Its totient is φ = 18503664.

The previous prime is 55511003. The next prime is 55511011. The reversal of 55511004 is 40011555.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55511003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2312947 + ... + 2312970.

Almost surely, 2^55511004 is an apocalyptic number.

It is an amenable number.

55511004 is an abundant number, since it is smaller than the sum of its proper divisors (74014700).

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

55511004 is a wasteful number, since it uses less digits than its factorization.

55511004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4625924 (or 4625922 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 55511004 is about 7450.5707163948. The cubic root of 55511004 is about 381.4693893070.

Adding to 55511004 its reverse (40011555), we get a palindrome (95522559).

It can be divided in two parts, 5551 and 1004, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 55511004 in words is "fifty-five million, five hundred eleven thousand, four".