55072749 has 16 divisors (see below), whose sum is σ = 74317824. Its totient is φ = 36274800.

The previous prime is 55072747. The next prime is 55072753. The reversal of 55072749 is 94727055.

It is not a de Polignac number, because 55072749 - 2¹ = 55072747 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55072747) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 127564 + ... + 127994.

It is an arithmetic number, because the mean of its divisors is an integer number (4644864).

Almost surely, 2^55072749 is an apocalyptic number.

It is an amenable number.

55072749 is a deficient number, since it is larger than the sum of its proper divisors (19245075).

55072749 is a wasteful number, since it uses less digits than its factorization.

55072749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848.

The product of its (nonzero) digits is 88200, while the sum is 39.

The square root of 55072749 is about 7421.1016028619. The cubic root of 55072749 is about 380.4628455291.

It can be divided in two parts, 5507 and 2749, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 55072749 in words is "fifty-five million, seventy-two thousand, seven hundred forty-nine".