55121241 has 16 divisors (see below), whose sum is σ = 84302208. Its totient is φ = 31382400.

The previous prime is 55121239. The next prime is 55121243. The reversal of 55121241 is 14212155.

It is an interprime number because it is at equal distance from previous prime (55121239) and next prime (55121243).

It is not a de Polignac number, because 55121241 - 2¹ = 55121239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (55121243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1231 + ... + 10571.

It is an arithmetic number, because the mean of its divisors is an integer number (5268888).

Almost surely, 2^55121241 is an apocalyptic number.

It is an amenable number.

55121241 is a deficient number, since it is larger than the sum of its proper divisors (29180967).

55121241 is a wasteful number, since it uses less digits than its factorization.

55121241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9632.

The product of its digits is 400, while the sum is 21.

The square root of 55121241 is about 7424.3680539154. The cubic root of 55121241 is about 380.5744796394.

Adding to 55121241 its reverse (14212155), we get a palindrome (69333396).

The spelling of 55121241 in words is "fifty-five million, one hundred twenty-one thousand, two hundred forty-one".