440724042251 has 4 divisors (see below), whose sum is σ = 449039590272. Its totient is φ = 432408494232.

The previous prime is 440724042229. The next prime is 440724042293. The reversal of 440724042251 is 152240427044.

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 440724042251 - 2¹⁴ = 440724025867 is a prime.

It is a super-2 number, since 2×440724042251² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (440724042221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4157773931 + ... + 4157774036.

It is an arithmetic number, because the mean of its divisors is an integer number (112259897568).

Almost surely, 2^440724042251 is an apocalyptic number.

440724042251 is a deficient number, since it is larger than the sum of its proper divisors (8315548021).

440724042251 is an equidigital number, since it uses as much as digits as its factorization.

440724042251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8315548020.

The product of its (nonzero) digits is 71680, while the sum is 35.

Adding to 440724042251 its reverse (152240427044), we get a palindrome (592964469295).

The spelling of 440724042251 in words is "four hundred forty billion, seven hundred twenty-four million, forty-two thousand, two hundred fifty-one".