55211749 has 4 divisors (see below), whose sum is σ = 55229580. Its totient is φ = 55193920.

The previous prime is 55211731. The next prime is 55211809. The reversal of 55211749 is 94711255.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94711255 = 5 ⋅18942251.

It can be written as a sum of positive squares in 2 ways, for example, as 21687649 + 33524100 = 4657^2 + 5790^2 .

It is a cyclic number.

It is not a de Polignac number, because 55211749 - 2⁹ = 55211237 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 (55211729) 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, 2932 + ... + 10909.

It is an arithmetic number, because the mean of its divisors is an integer number (13807395).

Almost surely, 2^55211749 is an apocalyptic number.

It is an amenable number.

55211749 is a deficient number, since it is larger than the sum of its proper divisors (17831).

55211749 is a wasteful number, since it uses less digits than its factorization.

55211749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17830.

The product of its digits is 12600, while the sum is 34.

The square root of 55211749 is about 7430.4608874551. The cubic root of 55211749 is about 380.7826643541.

The spelling of 55211749 in words is "fifty-five million, two hundred eleven thousand, seven hundred forty-nine".