10040400031 has 4 divisors (see below), whose sum is σ = 10311762232. Its totient is φ = 9769037832.

The previous prime is 10040400023. The next prime is 10040400047. The reversal of 10040400031 is 13000404001.

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 10040400031 - 2³ = 10040400023 is a prime.

It is a super-2 number, since 2×10040400031² (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 = 10040399984 and 10040400020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10040400091) 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, 135681045 + ... + 135681118.

It is an arithmetic number, because the mean of its divisors is an integer number (2577940558).

Almost surely, 2^10040400031 is an apocalyptic number.

10040400031 is a deficient number, since it is larger than the sum of its proper divisors (271362201).

10040400031 is an equidigital number, since it uses as much as digits as its factorization.

10040400031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271362200.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 10040400031 its reverse (13000404001), we get a palindrome (23040804032).

The spelling of 10040400031 in words is "ten billion, forty million, four hundred thousand, thirty-one".