40401234431 has 4 divisors (see below), whose sum is σ = 40634767752. Its totient is φ = 40167701112.

The previous prime is 40401234427. The next prime is 40401234469. The reversal of 40401234431 is 13443210404.

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 40401234431 - 2² = 40401234427 is a prime.

It is a super-2 number, since 2×40401234431² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40401234431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40401234491) 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, 116766401 + ... + 116766746.

It is an arithmetic number, because the mean of its divisors is an integer number (10158691938).

Almost surely, 2^40401234431 is an apocalyptic number.

40401234431 is a deficient number, since it is larger than the sum of its proper divisors (233533321).

40401234431 is a wasteful number, since it uses less digits than its factorization.

40401234431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233533320.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 40401234431 its reverse (13443210404), we get a palindrome (53844444835).

The spelling of 40401234431 in words is "forty billion, four hundred one million, two hundred thirty-four thousand, four hundred thirty-one".