13530400031 has 2 divisors, whose sum is σ = 13530400032. Its totient is φ = 13530400030.

The previous prime is 13530399937. The next prime is 13530400043. The reversal of 13530400031 is 13000403531.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13530400031 is a prime.

It is a super-2 number, since 2×13530400031² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13530399976 and 13530400012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13530400931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6765200015 + 6765200016.

It is an arithmetic number, because the mean of its divisors is an integer number (6765200016).

Almost surely, 2^13530400031 is an apocalyptic number.

13530400031 is a deficient number, since it is larger than the sum of its proper divisors (1).

13530400031 is an equidigital number, since it uses as much as digits as its factorization.

13530400031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 20.

Adding to 13530400031 its reverse (13000403531), we get a palindrome (26530803562).

The spelling of 13530400031 in words is "thirteen billion, five hundred thirty million, four hundred thousand, thirty-one".