54520981 has 4 divisors (see below), whose sum is σ = 55211200. Its totient is φ = 53830764.

The previous prime is 54520979. The next prime is 54520993. The reversal of 54520981 is 18902545.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18902545 = 5 ⋅3780509.

It is a cyclic number.

It is not a de Polignac number, because 54520981 - 2¹ = 54520979 is a prime.

It is a super-2 number, since 2×54520981² = 5945074738404722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54520951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 344991 + ... + 345148.

It is an arithmetic number, because the mean of its divisors is an integer number (13802800).

Almost surely, 2^54520981 is an apocalyptic number.

It is an amenable number.

54520981 is a deficient number, since it is larger than the sum of its proper divisors (690219).

54520981 is an equidigital number, since it uses as much as digits as its factorization.

54520981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690218.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 54520981 is about 7383.8324060071. The cubic root of 54520981 is about 379.1879728370.

The spelling of 54520981 in words is "fifty-four million, five hundred twenty thousand, nine hundred eighty-one".