55121005 has 8 divisors (see below), whose sum is σ = 66253824. Its totient is φ = 44024400.

The previous prime is 55120999. The next prime is 55121023. The reversal of 55121005 is 50012155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55121005 - 2²¹ = 53023853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5581 + ... + 11890.

It is an arithmetic number, because the mean of its divisors is an integer number (8281728).

Almost surely, 2^55121005 is an apocalyptic number.

It is an amenable number.

55121005 is a deficient number, since it is larger than the sum of its proper divisors (11132819).

55121005 is a wasteful number, since it uses less digits than its factorization.

55121005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18107.

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 55121005 is about 7424.3521602898. The cubic root of 55121005 is about 380.5739364991.

The spelling of 55121005 in words is "fifty-five million, one hundred twenty-one thousand, five".