55242553 has 4 divisors (see below), whose sum is σ = 55260900. Its totient is φ = 55224208.

The previous prime is 55242547. The next prime is 55242581. The reversal of 55242553 is 35524255.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19386409 + 35856144 = 4403^2 + 5988^2 .

It is a cyclic number.

It is not a de Polignac number, because 55242553 - 2⁵ = 55242521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55242853) 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, 3478 + ... + 11071.

It is an arithmetic number, because the mean of its divisors is an integer number (13815225).

Almost surely, 2^55242553 is an apocalyptic number.

It is an amenable number.

55242553 is a deficient number, since it is larger than the sum of its proper divisors (18347).

55242553 is a wasteful number, since it uses less digits than its factorization.

55242553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18346.

The product of its digits is 30000, while the sum is 31.

The square root of 55242553 is about 7432.5334173484. The cubic root of 55242553 is about 380.8534672095.

The spelling of 55242553 in words is "fifty-five million, two hundred forty-two thousand, five hundred fifty-three".