55207404 has 144 divisors (see below), whose sum is σ = 169967616. Its totient is φ = 14774400.

The previous prime is 55207403. The next prime is 55207423. The reversal of 55207404 is 40470255.

55207404 is a `hidden beast` number, since 55 + 207 + 404 = 666.

It is not an unprimeable number, because it can be changed into a prime (55207403) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 288949 + ... + 289139.

Almost surely, 2^55207404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55207404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84983808).

55207404 is an abundant number, since it is smaller than the sum of its proper divisors (114760212).

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

55207404 is a wasteful number, since it uses less digits than its factorization.

55207404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 271 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 55207404 is about 7430.1685041458. The cubic root of 55207404 is about 380.7726752720.

Adding to 55207404 its reverse (40470255), we get a palindrome (95677659).

It can be divided in two parts, 55207 and 404, that added together give a triangular number (55611 = T₃₃₃).

The spelling of 55207404 in words is "fifty-five million, two hundred seven thousand, four hundred four".