55415771 has 4 divisors (see below), whose sum is σ = 55964544. Its totient is φ = 54867000.

The previous prime is 55415753. The next prime is 55415783. The reversal of 55415771 is 17751455.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55415771 - 2⁶ = 55415707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55415791) 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, 274235 + ... + 274436.

It is an arithmetic number, because the mean of its divisors is an integer number (13991136).

Almost surely, 2^55415771 is an apocalyptic number.

55415771 is a deficient number, since it is larger than the sum of its proper divisors (548773).

55415771 is a wasteful number, since it uses less digits than its factorization.

55415771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 548772.

The product of its digits is 24500, while the sum is 35.

The square root of 55415771 is about 7444.1769860744. The cubic root of 55415771 is about 381.2511186566.

The spelling of 55415771 in words is "fifty-five million, four hundred fifteen thousand, seven hundred seventy-one".