54540981 has 48 divisors (see below), whose sum is σ = 95022720. Its totient is φ = 29736960.

The previous prime is 54540979. The next prime is 54540989. The reversal of 54540981 is 18904545.

It is not a de Polignac number, because 54540981 - 2¹ = 54540979 is a prime.

It is a super-2 number, since 2×54540981² = 5949437216884722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54540989) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38005 + ... + 39413.

It is an arithmetic number, because the mean of its divisors is an integer number (1979640).

Almost surely, 2^54540981 is an apocalyptic number.

54540981 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

54540981 is a deficient number, since it is larger than the sum of its proper divisors (40481739).

54540981 is a wasteful number, since it uses less digits than its factorization.

54540981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1466 (or 1463 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 54540981 is about 7385.1865920910. The cubic root of 54540981 is about 379.2343331689.

It can be divided in two parts, 545409 and 81, that added together give a triangular number (545490 = T₁₀₄₄).

The spelling of 54540981 in words is "fifty-four million, five hundred forty thousand, nine hundred eighty-one".