55545401 has 4 divisors (see below), whose sum is σ = 56118132. Its totient is φ = 54972672.

The previous prime is 55545389. The next prime is 55545403. The reversal of 55545401 is 10454555.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 34164025 + 21381376 = 5845^2 + 4624^2 .

It is a cyclic number.

It is not a de Polignac number, because 55545401 - 2¹⁸ = 55283257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55545403) 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, 286220 + ... + 286413.

It is an arithmetic number, because the mean of its divisors is an integer number (14029533).

Almost surely, 2^55545401 is an apocalyptic number.

It is an amenable number.

55545401 is a deficient number, since it is larger than the sum of its proper divisors (572731).

55545401 is an equidigital number, since it uses as much as digits as its factorization.

55545401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572730.

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

The square root of 55545401 is about 7452.8787055741. The cubic root of 55545401 is about 381.5481646391.

Adding to 55545401 its reverse (10454555), we get a palindrome (65999956).

The spelling of 55545401 in words is "fifty-five million, five hundred forty-five thousand, four hundred one".