54381815 has 16 divisors (see below), whose sum is σ = 68126400. Its totient is φ = 41620992.

The previous prime is 54381809. The next prime is 54381851. The reversal of 54381815 is 51818345.

It is a cyclic number.

It is not a de Polignac number, because 54381815 - 2⁶ = 54381751 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14726 + ... + 18044.

It is an arithmetic number, because the mean of its divisors is an integer number (4257900).

Almost surely, 2^54381815 is an apocalyptic number.

54381815 is a deficient number, since it is larger than the sum of its proper divisors (13744585).

54381815 is a wasteful number, since it uses less digits than its factorization.

54381815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3466.

The product of its digits is 19200, while the sum is 35.

The square root of 54381815 is about 7374.4026876758. The cubic root of 54381815 is about 378.8650694020.

The spelling of 54381815 in words is "fifty-four million, three hundred eighty-one thousand, eight hundred fifteen".