55927391 has 8 divisors (see below), whose sum is σ = 61630800. Its totient is φ = 50424192.

The previous prime is 55927381. The next prime is 55927397. The reversal of 55927391 is 19372955.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-55927391 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 (55927397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49466 + ... + 50583.

It is an arithmetic number, because the mean of its divisors is an integer number (7703850).

Almost surely, 2^55927391 is an apocalyptic number.

55927391 is a deficient number, since it is larger than the sum of its proper divisors (5703409).

55927391 is a wasteful number, since it uses less digits than its factorization.

55927391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100105.

The product of its digits is 85050, while the sum is 41.

The square root of 55927391 is about 7478.4618070831. The cubic root of 55927391 is about 382.4208126332.

It can be divided in two parts, 559 and 27391, that multiplied together give a square (15311569 = 3913²).

The spelling of 55927391 in words is "fifty-five million, nine hundred twenty-seven thousand, three hundred ninety-one".