54147561 has 16 divisors (see below), whose sum is σ = 77903616. Its totient is φ = 33255936.

The previous prime is 54147559. The next prime is 54147563. The reversal of 54147561 is 16574145.

It is an interprime number because it is at equal distance from previous prime (54147559) and next prime (54147563).

It is not a de Polignac number, because 54147561 - 2¹ = 54147559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (54147563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25216 + ... + 27278.

It is an arithmetic number, because the mean of its divisors is an integer number (4868976).

Almost surely, 2^54147561 is an apocalyptic number.

It is an amenable number.

54147561 is a deficient number, since it is larger than the sum of its proper divisors (23756055).

54147561 is a wasteful number, since it uses less digits than its factorization.

54147561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752.

The product of its digits is 16800, while the sum is 33.

The square root of 54147561 is about 7358.5026330090. The cubic root of 54147561 is about 378.3202892685.

The spelling of 54147561 in words is "fifty-four million, one hundred forty-seven thousand, five hundred sixty-one".