55155071 has 4 divisors (see below), whose sum is σ = 57057000. Its totient is φ = 53253144.

The previous prime is 55155053. The next prime is 55155101. The reversal of 55155071 is 17055155.

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 55155071 - 2⁶ = 55155007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 1901899 = 55155071 / (5 + 5 + 1 + 5 + 5 + 0 + 7 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55155011) 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, 950921 + ... + 950978.

It is an arithmetic number, because the mean of its divisors is an integer number (14264250).

Almost surely, 2^55155071 is an apocalyptic number.

55155071 is a deficient number, since it is larger than the sum of its proper divisors (1901929).

55155071 is a wasteful number, since it uses less digits than its factorization.

55155071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901928.

The product of its (nonzero) digits is 4375, while the sum is 29.

The square root of 55155071 is about 7426.6460128378. The cubic root of 55155071 is about 380.6523213896.

The spelling of 55155071 in words is "fifty-five million, one hundred fifty-five thousand, seventy-one".