55400101 has 4 divisors (see below), whose sum is σ = 55415104. Its totient is φ = 55385100.

The previous prime is 55400099. The next prime is 55400117. The reversal of 55400101 is 10100455.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 10100455 = 5 ⋅2020091.

It is a cyclic number.

It is not a de Polignac number, because 55400101 - 2¹ = 55400099 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55400141) 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, 2356 + ... + 10786.

It is an arithmetic number, because the mean of its divisors is an integer number (13853776).

Almost surely, 2^55400101 is an apocalyptic number.

It is an amenable number.

55400101 is a deficient number, since it is larger than the sum of its proper divisors (15003).

55400101 is an equidigital number, since it uses as much as digits as its factorization.

55400101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15002.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 55400101 is about 7443.1244111596. The cubic root of 55400101 is about 381.2151796202.

Adding to 55400101 its reverse (10100455), we get a palindrome (65500556).

The spelling of 55400101 in words is "fifty-five million, four hundred thousand, one hundred one".