55071591 has 8 divisors (see below), whose sum is σ = 76621440. Its totient is φ = 35118072.

The previous prime is 55071589. The next prime is 55071607. The reversal of 55071591 is 19517055.

55071591 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 55071591 - 2¹ = 55071589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55071571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 399001 + ... + 399138.

It is an arithmetic number, because the mean of its divisors is an integer number (9577680).

Almost surely, 2^55071591 is an apocalyptic number.

55071591 is a deficient number, since it is larger than the sum of its proper divisors (21549849).

55071591 is a wasteful number, since it uses less digits than its factorization.

55071591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798165.

The product of its (nonzero) digits is 7875, while the sum is 33.

The square root of 55071591 is about 7421.0235816901. The cubic root of 55071591 is about 380.4601788802.

The spelling of 55071591 in words is "fifty-five million, seventy-one thousand, five hundred ninety-one".