440231431 has 4 divisors (see below), whose sum is σ = 459371952. Its totient is φ = 421090912.

The previous prime is 440231423. The next prime is 440231443. The reversal of 440231431 is 134132044.

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 440231431 - 2³ = 440231423 is a prime.

It is a super-2 number, since 2×440231431² = 387607425680615522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440231401) 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, 9570226 + ... + 9570271.

It is an arithmetic number, because the mean of its divisors is an integer number (114842988).

Almost surely, 2^440231431 is an apocalyptic number.

440231431 is a deficient number, since it is larger than the sum of its proper divisors (19140521).

440231431 is a wasteful number, since it uses less digits than its factorization.

440231431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19140520.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 440231431 is about 20981.6927582119. The cubic root of 440231431 is about 760.7238204595.

Adding to 440231431 its reverse (134132044), we get a palindrome (574363475).

It can be divided in two parts, 44023 and 1431, that added together give a palindrome (45454).

The spelling of 440231431 in words is "four hundred forty million, two hundred thirty-one thousand, four hundred thirty-one".