55120641 has 4 divisors (see below), whose sum is σ = 73494192. Its totient is φ = 36747092.

The previous prime is 55120633. The next prime is 55120669. The reversal of 55120641 is 14602155.

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 55120641 - 2³ = 55120633 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55120601) 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, 9186771 + ... + 9186776.

It is an arithmetic number, because the mean of its divisors is an integer number (18373548).

Almost surely, 2^55120641 is an apocalyptic number.

It is an amenable number.

55120641 is a deficient number, since it is larger than the sum of its proper divisors (18373551).

55120641 is a wasteful number, since it uses less digits than its factorization.

55120641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18373550.

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 55120641 is about 7424.3276463260. The cubic root of 55120641 is about 380.5730987711.

Adding to 55120641 its reverse (14602155), we get a palindrome (69722796).

The spelling of 55120641 in words is "fifty-five million, one hundred twenty thousand, six hundred forty-one".