10400123431 has 4 divisors (see below), whose sum is σ = 10404202864. Its totient is φ = 10396044000.

The previous prime is 10400123413. The next prime is 10400123453. The reversal of 10400123431 is 13432100401.

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 10400123431 - 2²⁵ = 10366568999 is a prime.

It is a super-2 number, since 2×10400123431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10400123399 and 10400123408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10400123471) 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, 2035890 + ... + 2040991.

It is an arithmetic number, because the mean of its divisors is an integer number (2601050716).

Almost surely, 2^10400123431 is an apocalyptic number.

10400123431 is a deficient number, since it is larger than the sum of its proper divisors (4079433).

10400123431 is an equidigital number, since it uses as much as digits as its factorization.

10400123431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4079432.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 10400123431 its reverse (13432100401), we get a palindrome (23832223832).

The spelling of 10400123431 in words is "ten billion, four hundred million, one hundred twenty-three thousand, four hundred thirty-one".