54615391 has 2 divisors, whose sum is σ = 54615392. Its totient is φ = 54615390.

The previous prime is 54615377. The next prime is 54615413. The reversal of 54615391 is 19351645.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54615391 - 2⁷ = 54615263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54615311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27307695 + 27307696.

It is an arithmetic number, because the mean of its divisors is an integer number (27307696).

Almost surely, 2^54615391 is an apocalyptic number.

54615391 is a deficient number, since it is larger than the sum of its proper divisors (1).

54615391 is an equidigital number, since it uses as much as digits as its factorization.

54615391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 34.

The square root of 54615391 is about 7390.2226624101. Note that the first 3 decimals coincide. The cubic root of 54615391 is about 379.4067173285.

The spelling of 54615391 in words is "fifty-four million, six hundred fifteen thousand, three hundred ninety-one".