54147981 has 8 divisors (see below), whose sum is σ = 72261504. Its totient is φ = 36066560.

The previous prime is 54147953. The next prime is 54148001. The reversal of 54147981 is 18974145.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 54147981 - 2¹⁰ = 54146957 is a prime.

It is a super-2 number, since 2×54147981² = 5864007692752722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54147281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3765 + ... + 11066.

It is an arithmetic number, because the mean of its divisors is an integer number (9032688).

Almost surely, 2^54147981 is an apocalyptic number.

It is an amenable number.

54147981 is a deficient number, since it is larger than the sum of its proper divisors (18113523).

54147981 is a wasteful number, since it uses less digits than its factorization.

54147981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16051.

The product of its digits is 40320, while the sum is 39.

The square root of 54147981 is about 7358.5311713684. The cubic root of 54147981 is about 378.3212674234.

The spelling of 54147981 in words is "fifty-four million, one hundred forty-seven thousand, nine hundred eighty-one".