55554401 has 16 divisors (see below), whose sum is σ = 66042240. Its totient is φ = 45722880.

The previous prime is 55554383. The next prime is 55554479. The reversal of 55554401 is 10445555.

It is a happy number.

It is not a de Polignac number, because 55554401 - 2⁶ = 55554337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55554481) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42185 + ... + 43481.

It is an arithmetic number, because the mean of its divisors is an integer number (4127640).

Almost surely, 2^55554401 is an apocalyptic number.

It is an amenable number.

55554401 is a deficient number, since it is larger than the sum of its proper divisors (10487839).

55554401 is a wasteful number, since it uses less digits than its factorization.

55554401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544.

The product of its (nonzero) digits is 10000, while the sum is 29.

The square root of 55554401 is about 7453.4824746557. The cubic root of 55554401 is about 381.5687708938.

Adding to 55554401 its reverse (10445555), we get a palindrome (65999956).

It can be divided in two parts, 55554 and 401, that added together give a palindrome (55955).

The spelling of 55554401 in words is "fifty-five million, five hundred fifty-four thousand, four hundred one".