54215251 has 4 divisors (see below), whose sum is σ = 54901600. Its totient is φ = 53528904.

The previous prime is 54215221. The next prime is 54215321. The reversal of 54215251 is 15251245.

54215251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 54215251 - 2¹³ = 54207059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54215221) 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 in 3 ways as a sum of consecutive naturals, for example, 343056 + ... + 343213.

It is an arithmetic number, because the mean of its divisors is an integer number (13725400).

Almost surely, 2^54215251 is an apocalyptic number.

54215251 is a deficient number, since it is larger than the sum of its proper divisors (686349).

54215251 is an equidigital number, since it uses as much as digits as its factorization.

54215251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686348.

The product of its digits is 2000, while the sum is 25.

The square root of 54215251 is about 7363.1006376390. The cubic root of 54215251 is about 378.4778699993.

Adding to 54215251 its reverse (15251245), we get a palindrome (69466496).

The spelling of 54215251 in words is "fifty-four million, two hundred fifteen thousand, two hundred fifty-one".