54707521 has 4 divisors (see below), whose sum is σ = 59680944. Its totient is φ = 49734100.

The previous prime is 54707503. The next prime is 54707533. The reversal of 54707521 is 12570745.

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 not a de Polignac number, because 54707521 - 2¹⁷ = 54576449 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54707551) 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, 2486695 + ... + 2486716.

It is an arithmetic number, because the mean of its divisors is an integer number (14920236).

Almost surely, 2^54707521 is an apocalyptic number.

It is an amenable number.

54707521 is a deficient number, since it is larger than the sum of its proper divisors (4973423).

54707521 is a wasteful number, since it uses less digits than its factorization.

54707521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4973422.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 54707521 is about 7396.4532716701. The cubic root of 54707521 is about 379.6199362504.

The spelling of 54707521 in words is "fifty-four million, seven hundred seven thousand, five hundred twenty-one".