55248749 has 4 divisors (see below), whose sum is σ = 55278336. Its totient is φ = 55219164.

The previous prime is 55248709. The next prime is 55248757. The reversal of 55248749 is 94784255.

It is a happy number.

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 55248749 - 2¹⁶ = 55183213 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 (55248709) 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, 11789 + ... + 15794.

It is an arithmetic number, because the mean of its divisors is an integer number (13819584).

Almost surely, 2^55248749 is an apocalyptic number.

It is an amenable number.

55248749 is a deficient number, since it is larger than the sum of its proper divisors (29587).

55248749 is a wasteful number, since it uses less digits than its factorization.

55248749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29586.

The product of its digits is 403200, while the sum is 44.

The square root of 55248749 is about 7432.9502218164. The cubic root of 55248749 is about 380.8677055080.

The spelling of 55248749 in words is "fifty-five million, two hundred forty-eight thousand, seven hundred forty-nine".