55145004 has 24 divisors (see below), whose sum is σ = 129179568. Its totient is φ = 18309120.

The previous prime is 55144997. The next prime is 55145021. The reversal of 55145004 is 40054155.

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, 5857 + ... + 12024.

It is an arithmetic number, because the mean of its divisors is an integer number (5382482).

Almost surely, 2^55145004 is an apocalyptic number.

It is an amenable number.

55145004 is an abundant number, since it is smaller than the sum of its proper divisors (74034564).

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

55145004 is a wasteful number, since it uses less digits than its factorization.

55145004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18145 (or 18143 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 55145004 is about 7425.9682197004. The cubic root of 55145004 is about 380.6291608714.

Adding to 55145004 its reverse (40054155), we get a palindrome (95199159).

The spelling of 55145004 in words is "fifty-five million, one hundred forty-five thousand, four".