13500405031 has 4 divisors (see below), whose sum is σ = 13501243792. Its totient is φ = 13499566272.

The previous prime is 13500405029. The next prime is 13500405049. The reversal of 13500405031 is 13050400531.

It is a happy number.

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 13500405031 - 2¹ = 13500405029 is a prime.

It is a super-2 number, since 2×13500405031² (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 = 13500404993 and 13500405011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13500405071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394755 + ... + 427588.

It is an arithmetic number, because the mean of its divisors is an integer number (3375310948).

Almost surely, 2^13500405031 is an apocalyptic number.

13500405031 is a deficient number, since it is larger than the sum of its proper divisors (838761).

13500405031 is an equidigital number, since it uses as much as digits as its factorization.

13500405031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838760.

The product of its (nonzero) digits is 900, while the sum is 22.

Adding to 13500405031 its reverse (13050400531), we get a palindrome (26550805562).

The spelling of 13500405031 in words is "thirteen billion, five hundred million, four hundred five thousand, thirty-one".