55276121 has 4 divisors (see below), whose sum is σ = 55392000. Its totient is φ = 55160244.

The previous prime is 55276103. The next prime is 55276157. The reversal of 55276121 is 12167255.

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: 12167255 = 5 ⋅2433451.

It is a cyclic number.

It is not a de Polignac number, because 55276121 - 2⁶ = 55276057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55276171) 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, 57221 + ... + 58178.

It is an arithmetic number, because the mean of its divisors is an integer number (13848000).

Almost surely, 2^55276121 is an apocalyptic number.

It is an amenable number.

55276121 is a deficient number, since it is larger than the sum of its proper divisors (115879).

55276121 is a wasteful number, since it uses less digits than its factorization.

55276121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115878.

The product of its digits is 4200, while the sum is 29.

The square root of 55276121 is about 7434.7912546352. The cubic root of 55276121 is about 380.9305931440.

The spelling of 55276121 in words is "fifty-five million, two hundred seventy-six thousand, one hundred twenty-one".