54151621 has 2 divisors, whose sum is σ = 54151622. Its totient is φ = 54151620.

The previous prime is 54151589. The next prime is 54151633. The reversal of 54151621 is 12615145.

It is a happy number.

54151621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50211396 + 3940225 = 7086^2 + 1985^2 .

It is a cyclic number.

It is not a de Polignac number, because 54151621 - 2⁵ = 54151589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54151651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27075810 + 27075811.

It is an arithmetic number, because the mean of its divisors is an integer number (27075811).

Almost surely, 2^54151621 is an apocalyptic number.

It is an amenable number.

54151621 is a deficient number, since it is larger than the sum of its proper divisors (1).

54151621 is an equidigital number, since it uses as much as digits as its factorization.

54151621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1200, while the sum is 25.

The square root of 54151621 is about 7358.7784991804. The cubic root of 54151621 is about 378.3297445542.

Adding to 54151621 its reverse (12615145), we get a palindrome (66766766).

The spelling of 54151621 in words is "fifty-four million, one hundred fifty-one thousand, six hundred twenty-one".