1531384215133 has 2 divisors, whose sum is σ = 1531384215134. Its totient is φ = 1531384215132.

The previous prime is 1531384215113. The next prime is 1531384215187. The reversal of 1531384215133 is 3315124831351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1364137569369 + 167246645764 = 1167963^2 + 408958^2 .

It is a cyclic number.

It is not a de Polignac number, because 1531384215133 - 2²⁵ = 1531350660701 is a prime.

It is a super-2 number, since 2×1531384215133² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1531384215113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765692107566 + 765692107567.

It is an arithmetic number, because the mean of its divisors is an integer number (765692107567).

Almost surely, 2^{1531384215133} is an apocalyptic number.

It is an amenable number.

1531384215133 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531384215133 is an equidigital number, since it uses as much as digits as its factorization.

1531384215133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 40.

The spelling of 1531384215133 in words is "one trillion, five hundred thirty-one billion, three hundred eighty-four million, two hundred fifteen thousand, one hundred thirty-three".