54561547 has 4 divisors (see below), whose sum is σ = 55071576. Its totient is φ = 54051520.

The previous prime is 54561509. The next prime is 54561553. The reversal of 54561547 is 74516545.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 54561547 - 2²³ = 46172939 is a prime.

It is a super-2 number, since 2×54561547² = 5953924822066418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54591547) 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, 254854 + ... + 255067.

It is an arithmetic number, because the mean of its divisors is an integer number (13767894).

Almost surely, 2^54561547 is an apocalyptic number.

54561547 is a deficient number, since it is larger than the sum of its proper divisors (510029).

54561547 is a wasteful number, since it uses less digits than its factorization.

54561547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 510028.

The product of its digits is 84000, while the sum is 37.

The square root of 54561547 is about 7386.5788427390. The cubic root of 54561547 is about 379.2819936806.

The spelling of 54561547 in words is "fifty-four million, five hundred sixty-one thousand, five hundred forty-seven".