55053121 has 4 divisors (see below), whose sum is σ = 56224512. Its totient is φ = 53881732.

The previous prime is 55053101. The next prime is 55053133. The reversal of 55053121 is 12135055.

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.

It is a cyclic number.

It is not a de Polignac number, because 55053121 - 2⁹ = 55052609 is a prime.

It is a super-2 number, since 2×55053121² = 6061692263681282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55053092 and 55053101.

It is not an unprimeable number, because it can be changed into a prime (55053101) 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, 585625 + ... + 585718.

It is an arithmetic number, because the mean of its divisors is an integer number (14056128).

Almost surely, 2^55053121 is an apocalyptic number.

It is an amenable number.

55053121 is a deficient number, since it is larger than the sum of its proper divisors (1171391).

55053121 is a wasteful number, since it uses less digits than its factorization.

55053121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171390.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 55053121 is about 7419.7790398367. The cubic root of 55053121 is about 380.4176410060.

Adding to 55053121 its reverse (12135055), we get a palindrome (67188176).

The spelling of 55053121 in words is "fifty-five million, fifty-three thousand, one hundred twenty-one".