55271551 has 16 divisors (see below), whose sum is σ = 59837440. Its totient is φ = 50893920.

The previous prime is 55271521. The next prime is 55271569. The reversal of 55271551 is 15517255.

It is a cyclic number.

It is not a de Polignac number, because 55271551 - 2⁷ = 55271423 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 (55271501) 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, 119146 + ... + 119608.

It is an arithmetic number, because the mean of its divisors is an integer number (3739840).

Almost surely, 2^55271551 is an apocalyptic number.

55271551 is a deficient number, since it is larger than the sum of its proper divisors (4565889).

55271551 is a wasteful number, since it uses less digits than its factorization.

55271551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646.

The product of its digits is 8750, while the sum is 31.

The square root of 55271551 is about 7434.4839094587. The cubic root of 55271551 is about 380.9200949352.

The spelling of 55271551 in words is "fifty-five million, two hundred seventy-one thousand, five hundred fifty-one".