54561381 has 16 divisors (see below), whose sum is σ = 88032384. Its totient is φ = 29343744.

The previous prime is 54561379. The next prime is 54561391. The reversal of 54561381 is 18316545.

It is not a de Polignac number, because 54561381 - 2¹ = 54561379 is a prime.

It is a super-2 number, since 2×54561381² = 5953888593254322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54561301) 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, 76060 + ... + 76773.

It is an arithmetic number, because the mean of its divisors is an integer number (5502024).

Almost surely, 2^54561381 is an apocalyptic number.

54561381 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

54561381 is a deficient number, since it is larger than the sum of its proper divisors (33471003).

54561381 is a wasteful number, since it uses less digits than its factorization.

54561381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152860.

The product of its digits is 14400, while the sum is 33.

The square root of 54561381 is about 7386.5676061348. The cubic root of 54561381 is about 379.2816090332.

The spelling of 54561381 in words is "fifty-four million, five hundred sixty-one thousand, three hundred eighty-one".