55250121 has 8 divisors (see below), whose sum is σ = 73703520. Its totient is φ = 36815072.

The previous prime is 55250101. The next prime is 55250159. The reversal of 55250121 is 12105255.

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

It is a cyclic number.

It is not a de Polignac number, because 55250121 - 2¹⁵ = 55217353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55250101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5806 + ... + 12008.

It is an arithmetic number, because the mean of its divisors is an integer number (9212940).

Almost surely, 2^55250121 is an apocalyptic number.

It is an amenable number.

55250121 is a deficient number, since it is larger than the sum of its proper divisors (18453399).

55250121 is a wasteful number, since it uses less digits than its factorization.

55250121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9175.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 55250121 is about 7433.0425129956. The cubic root of 55250121 is about 380.8708581957.

Adding to 55250121 its reverse (12105255), we get a palindrome (67355376).

The spelling of 55250121 in words is "fifty-five million, two hundred fifty thousand, one hundred twenty-one".