55216297249 has 4 divisors (see below), whose sum is σ = 56997468160. Its totient is φ = 53435126340.

The previous prime is 55216297243. The next prime is 55216297259. The reversal of 55216297249 is 94279261255.

It is a happy number.

55216297249 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 not a de Polignac number, because 55216297249 - 2¹³ = 55216289057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55216297196 and 55216297205.

It is not an unprimeable number, because it can be changed into a prime (55216297243) 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, 890585409 + ... + 890585470.

It is an arithmetic number, because the mean of its divisors is an integer number (14249367040).

Almost surely, 2^55216297249 is an apocalyptic number.

It is an amenable number.

55216297249 is a deficient number, since it is larger than the sum of its proper divisors (1781170911).

55216297249 is a wasteful number, since it uses less digits than its factorization.

55216297249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781170910.

The product of its digits is 2721600, while the sum is 52.

The spelling of 55216297249 in words is "fifty-five billion, two hundred sixteen million, two hundred ninety-seven thousand, two hundred forty-nine".