54661361 has 4 divisors (see below), whose sum is σ = 54702324. Its totient is φ = 54620400.

The previous prime is 54661357. The next prime is 54661421. The reversal of 54661361 is 16316645.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31080625 + 23580736 = 5575^2 + 4856^2 .

It is a cyclic number.

It is not a de Polignac number, because 54661361 - 2² = 54661357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (54661331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18410 + ... + 21171.

It is an arithmetic number, because the mean of its divisors is an integer number (13675581).

Almost surely, 2^54661361 is an apocalyptic number.

It is an amenable number.

54661361 is a deficient number, since it is larger than the sum of its proper divisors (40963).

54661361 is a wasteful number, since it uses less digits than its factorization.

54661361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40962.

The product of its digits is 12960, while the sum is 32.

The square root of 54661361 is about 7393.3321986774. The cubic root of 54661361 is about 379.5131368760.

The spelling of 54661361 in words is "fifty-four million, six hundred sixty-one thousand, three hundred sixty-one".