54115599 has 4 divisors (see below), whose sum is σ = 72154136. Its totient is φ = 36077064.

The previous prime is 54115583. The next prime is 54115603. The reversal of 54115599 is 99551145.

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

It is not a de Polignac number, because 54115599 - 2⁴ = 54115583 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 (54115519) 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, 9019264 + ... + 9019269.

It is an arithmetic number, because the mean of its divisors is an integer number (18038534).

Almost surely, 2^54115599 is an apocalyptic number.

54115599 is a deficient number, since it is larger than the sum of its proper divisors (18038537).

54115599 is a wasteful number, since it uses less digits than its factorization.

54115599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18038536.

The product of its digits is 40500, while the sum is 39.

The square root of 54115599 is about 7356.3305390663. The cubic root of 54115599 is about 378.2458368350.

The spelling of 54115599 in words is "fifty-four million, one hundred fifteen thousand, five hundred ninety-nine".