55400413 has 4 divisors (see below), whose sum is σ = 55732320. Its totient is φ = 55068508.

The previous prime is 55400407. The next prime is 55400417. The reversal of 55400413 is 31400455.

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 an emirpimes, since its reverse is a distinct semiprime: 31400455 = 5 ⋅6280091.

It is a cyclic number.

It is not a de Polignac number, because 55400413 - 2¹³ = 55392221 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 (55400417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165703 + ... + 166036.

It is an arithmetic number, because the mean of its divisors is an integer number (13933080).

Almost surely, 2^55400413 is an apocalyptic number.

It is an amenable number.

55400413 is a deficient number, since it is larger than the sum of its proper divisors (331907).

55400413 is a wasteful number, since it uses less digits than its factorization.

55400413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331906.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 55400413 is about 7443.1453700704. The cubic root of 55400413 is about 381.2158952562.

Adding to 55400413 its reverse (31400455), we get a palindrome (86800868).

The spelling of 55400413 in words is "fifty-five million, four hundred thousand, four hundred thirteen".