54101621 has 4 divisors (see below), whose sum is σ = 61830432. Its totient is φ = 46372812.

The previous prime is 54101609. The next prime is 54101647. The reversal of 54101621 is 12610145.

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 54101621 - 2¹⁰ = 54100597 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54101593 and 54101602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54101651) 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, 3864395 + ... + 3864408.

It is an arithmetic number, because the mean of its divisors is an integer number (15457608).

Almost surely, 2^54101621 is an apocalyptic number.

It is an amenable number.

54101621 is a deficient number, since it is larger than the sum of its proper divisors (7728811).

54101621 is an equidigital number, since it uses as much as digits as its factorization.

54101621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7728810.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 54101621 is about 7355.3804116443. The cubic root of 54101621 is about 378.2132672020.

Adding to 54101621 its reverse (12610145), we get a palindrome (66711766).

The spelling of 54101621 in words is "fifty-four million, one hundred one thousand, six hundred twenty-one".