54533561 has 4 divisors (see below), whose sum is σ = 54550272. Its totient is φ = 54516852.

The previous prime is 54533551. The next prime is 54533581. The reversal of 54533561 is 16533545.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54533561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54533551) 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, 1685 + ... + 10578.

It is an arithmetic number, because the mean of its divisors is an integer number (13637568).

Almost surely, 2^54533561 is an apocalyptic number.

It is an amenable number.

54533561 is a deficient number, since it is larger than the sum of its proper divisors (16711).

54533561 is a wasteful number, since it uses less digits than its factorization.

54533561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16710.

The product of its digits is 27000, while the sum is 32.

The square root of 54533561 is about 7384.6842180286. The cubic root of 54533561 is about 379.2171348084.

The spelling of 54533561 in words is "fifty-four million, five hundred thirty-three thousand, five hundred sixty-one".