55249743 has 4 divisors (see below), whose sum is σ = 73666328. Its totient is φ = 36833160.

The previous prime is 55249721. The next prime is 55249751. The reversal of 55249743 is 34794255.

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

It is not a de Polignac number, because 55249743 - 2⁹ = 55249231 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 (55249543) 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, 9208288 + ... + 9208293.

It is an arithmetic number, because the mean of its divisors is an integer number (18416582).

Almost surely, 2^55249743 is an apocalyptic number.

55249743 is a deficient number, since it is larger than the sum of its proper divisors (18416585).

55249743 is a wasteful number, since it uses less digits than its factorization.

55249743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18416584.

The product of its digits is 151200, while the sum is 39.

The square root of 55249743 is about 7433.0170859483. The cubic root of 55249743 is about 380.8699896033.

The spelling of 55249743 in words is "fifty-five million, two hundred forty-nine thousand, seven hundred forty-three".