55209253 has 4 divisors (see below), whose sum is σ = 60228288. Its totient is φ = 50190220.

The previous prime is 55209227. The next prime is 55209277. The reversal of 55209253 is 35290255.

55209253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-55209253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55201253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2509501 + ... + 2509522.

It is an arithmetic number, because the mean of its divisors is an integer number (15057072).

Almost surely, 2^55209253 is an apocalyptic number.

It is an amenable number.

55209253 is a deficient number, since it is larger than the sum of its proper divisors (5019035).

55209253 is a wasteful number, since it uses less digits than its factorization.

55209253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5019034.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 55209253 is about 7430.2929282768. The cubic root of 55209253 is about 380.7769261560.

The spelling of 55209253 in words is "fifty-five million, two hundred nine thousand, two hundred fifty-three".