54729581 has 4 divisors (see below), whose sum is σ = 57109152. Its totient is φ = 52350012.

The previous prime is 54729559. The next prime is 54729643. The reversal of 54729581 is 18592745.

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, and also an emirpimes, since its reverse is a distinct semiprime: 18592745 = 5 ⋅3718549.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54729581 is a prime.

It is a super-2 number, since 2×54729581² = 5990654072871122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54729281) 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, 1189751 + ... + 1189796.

It is an arithmetic number, because the mean of its divisors is an integer number (14277288).

Almost surely, 2^54729581 is an apocalyptic number.

It is an amenable number.

54729581 is a deficient number, since it is larger than the sum of its proper divisors (2379571).

54729581 is a wasteful number, since it uses less digits than its factorization.

54729581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2379570.

The product of its digits is 100800, while the sum is 41.

The square root of 54729581 is about 7397.9443766495. The cubic root of 54729581 is about 379.6709547714.

The spelling of 54729581 in words is "fifty-four million, seven hundred twenty-nine thousand, five hundred eighty-one".