54535621 has 4 divisors (see below), whose sum is σ = 62326432. Its totient is φ = 46744812.

The previous prime is 54535601. The next prime is 54535627. The reversal of 54535621 is 12653545.

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: 12653545 = 5 ⋅2530709.

It is a cyclic number.

It is not a de Polignac number, because 54535621 - 2⁵ = 54535589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54535627) 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, 3895395 + ... + 3895408.

It is an arithmetic number, because the mean of its divisors is an integer number (15581608).

Almost surely, 2^54535621 is an apocalyptic number.

It is an amenable number.

54535621 is a deficient number, since it is larger than the sum of its proper divisors (7790811).

54535621 is an equidigital number, since it uses as much as digits as its factorization.

54535621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7790810.

The product of its digits is 18000, while the sum is 31.

The square root of 54535621 is about 7384.8236945780. The cubic root of 54535621 is about 379.2219097118.

The spelling of 54535621 in words is "fifty-four million, five hundred thirty-five thousand, six hundred twenty-one".