54109561 has 8 divisors (see below), whose sum is σ = 59276448. Its totient is φ = 48984000.

The previous prime is 54109553. The next prime is 54109567. The reversal of 54109561 is 16590145.

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 54109561 - 2³ = 54109553 is a prime.

It is a super-2 number, since 2×54109561² = 5855689183225442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (54109567) 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, 7555 + ... + 12856.

It is an arithmetic number, because the mean of its divisors is an integer number (7409556).

Almost surely, 2^54109561 is an apocalyptic number.

It is an amenable number.

54109561 is a deficient number, since it is larger than the sum of its proper divisors (5166887).

54109561 is a wasteful number, since it uses less digits than its factorization.

54109561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20663.

The product of its (nonzero) digits is 5400, while the sum is 31.

The square root of 54109561 is about 7355.9201327910. The cubic root of 54109561 is about 378.2317685974.

The spelling of 54109561 in words is "fifty-four million, one hundred nine thousand, five hundred sixty-one".