54142221 has 8 divisors (see below), whose sum is σ = 82502464. Its totient is φ = 30938400.

The previous prime is 54142219. The next prime is 54142247. The reversal of 54142221 is 12224145.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 54142221 - 2¹ = 54142219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 2578201 = 54142221 / (5 + 4 + 1 + 4 + 2 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54142271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1289080 + ... + 1289121.

It is an arithmetic number, because the mean of its divisors is an integer number (10312808).

Almost surely, 2^54142221 is an apocalyptic number.

It is an amenable number.

54142221 is a deficient number, since it is larger than the sum of its proper divisors (28360243).

54142221 is a wasteful number, since it uses less digits than its factorization.

54142221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578211.

The product of its digits is 640, while the sum is 21.

The square root of 54142221 is about 7358.1397785038. The cubic root of 54142221 is about 378.3078522863.

Adding to 54142221 its reverse (12224145), we get a palindrome (66366366).

The spelling of 54142221 in words is "fifty-four million, one hundred forty-two thousand, two hundred twenty-one".