55420004 has 6 divisors (see below), whose sum is σ = 96985014. Its totient is φ = 27710000.

The previous prime is 55419929. The next prime is 55420039. The reversal of 55420004 is 40002455.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 43586404 + 11833600 = 6602^2 + 3440^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6927497 + ... + 6927504.

It is an arithmetic number, because the mean of its divisors is an integer number (16164169).

Almost surely, 2^55420004 is an apocalyptic number.

It is an amenable number.

55420004 is a deficient number, since it is larger than the sum of its proper divisors (41565010).

55420004 is a wasteful number, since it uses less digits than its factorization.

55420004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13855005 (or 13855003 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 55420004 is about 7444.4612968300. The cubic root of 55420004 is about 381.2608258504.

Adding to 55420004 its reverse (40002455), we get a palindrome (95422459).

The spelling of 55420004 in words is "fifty-five million, four hundred twenty thousand, four".