54221731 has 4 divisors (see below), whose sum is σ = 54252072. Its totient is φ = 54191392.

The previous prime is 54221707. The next prime is 54221743. The reversal of 54221731 is 13712245.

It is a happy number.

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 54221731 - 2¹³ = 54213539 is a prime.

It is a super-2 number, since 2×54221731² = 5879992225272722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54221696 and 54221705.

It is not an unprimeable number, because it can be changed into a prime (54221771) 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, 12310 + ... + 16123.

It is an arithmetic number, because the mean of its divisors is an integer number (13563018).

Almost surely, 2^54221731 is an apocalyptic number.

54221731 is a deficient number, since it is larger than the sum of its proper divisors (30341).

54221731 is a wasteful number, since it uses less digits than its factorization.

54221731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30340.

The product of its digits is 1680, while the sum is 25.

The square root of 54221731 is about 7363.5406565049. The cubic root of 54221731 is about 378.4929484065.

Adding to 54221731 its reverse (13712245), we get a palindrome (67933976).

The spelling of 54221731 in words is "fifty-four million, two hundred twenty-one thousand, seven hundred thirty-one".