54171819 has 24 divisors (see below), whose sum is σ = 84739200. Its totient is φ = 33149952.

The previous prime is 54171779. The next prime is 54171839. The reversal of 54171819 is 91817145.

It is not a de Polignac number, because 54171819 - 2⁸ = 54171563 is a prime.

It is a super-2 number, since 2×54171819² = 5869171947537522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (54171839) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21382 + ... + 23780.

It is an arithmetic number, because the mean of its divisors is an integer number (3530800).

Almost surely, 2^54171819 is an apocalyptic number.

54171819 is a deficient number, since it is larger than the sum of its proper divisors (30567381).

54171819 is a wasteful number, since it uses less digits than its factorization.

54171819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2611 (or 2608 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 54171819 is about 7360.1507457388. The cubic root of 54171819 is about 378.3767764138.

The spelling of 54171819 in words is "fifty-four million, one hundred seventy-one thousand, eight hundred nineteen".