400131031431 has 16 divisors (see below), whose sum is σ = 537468710400. Its totient is φ = 264774168768.

The previous prime is 400131031403. The next prime is 400131031471. The reversal of 400131031431 is 134130131004.

It is not a de Polignac number, because 400131031431 - 2¹⁰ = 400131030407 is a prime.

It is a super-2 number, since 2×400131031431² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400131031398 and 400131031407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400131031471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3527680 + ... + 3639338.

It is an arithmetic number, because the mean of its divisors is an integer number (33591794400).

Almost surely, 2^400131031431 is an apocalyptic number.

400131031431 is a deficient number, since it is larger than the sum of its proper divisors (137337678969).

400131031431 is a wasteful number, since it uses less digits than its factorization.

400131031431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120518.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 400131031431 its reverse (134130131004), we get a palindrome (534261162435).

The spelling of 400131031431 in words is "four hundred billion, one hundred thirty-one million, thirty-one thousand, four hundred thirty-one".