55146191 has 4 divisors (see below), whose sum is σ = 55175400. Its totient is φ = 55116984.

The previous prime is 55146173. The next prime is 55146193. The reversal of 55146191 is 19164155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19164155 = 5 ⋅3832831.

It is a cyclic number.

It is not a de Polignac number, because 55146191 - 2⁶ = 55146127 is a prime.

It is a super-2 number, since 2×55146191² = 6082204763616962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55146193) 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, 11561 + ... + 15618.

It is an arithmetic number, because the mean of its divisors is an integer number (13793850).

Almost surely, 2^55146191 is an apocalyptic number.

55146191 is a deficient number, since it is larger than the sum of its proper divisors (29209).

55146191 is a wasteful number, since it uses less digits than its factorization.

55146191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29208.

The product of its digits is 5400, while the sum is 32.

The square root of 55146191 is about 7426.0481415084. The cubic root of 55146191 is about 380.6318918747.

The spelling of 55146191 in words is "fifty-five million, one hundred forty-six thousand, one hundred ninety-one".