400431240551 has 8 divisors (see below), whose sum is σ = 417945151104. Its totient is φ = 382925984760.

The previous prime is 400431240529. The next prime is 400431240613. The reversal of 400431240551 is 155042134004.

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

It is a cyclic number.

It is not a de Polignac number, because 400431240551 - 2³⁴ = 383251371367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400431243551) 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, 2069045 + ... + 2254286.

It is an arithmetic number, because the mean of its divisors is an integer number (52243143888).

Almost surely, 2^400431240551 is an apocalyptic number.

400431240551 is a deficient number, since it is larger than the sum of its proper divisors (17513910553).

400431240551 is a wasteful number, since it uses less digits than its factorization.

400431240551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4327381.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 400431240551 its reverse (155042134004), we get a palindrome (555473374555).

The spelling of 400431240551 in words is "four hundred billion, four hundred thirty-one million, two hundred forty thousand, five hundred fifty-one".