1531573100149 has 2 divisors, whose sum is σ = 1531573100150. Its totient is φ = 1531573100148.

The previous prime is 1531573100143. The next prime is 1531573100159. The reversal of 1531573100149 is 9410013751351.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1027551197124 + 504021903025 = 1013682^2 + 709945^2 .

It is an emirp because it is prime and its reverse (9410013751351) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1531573100149 - 2⁷ = 1531573100021 is a prime.

It is a super-2 number, since 2×1531573100149² (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 (1531573100143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 765786550074 + 765786550075.

It is an arithmetic number, because the mean of its divisors is an integer number (765786550075).

Almost surely, 2^{1531573100149} is an apocalyptic number.

It is an amenable number.

1531573100149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1531573100149 is an equidigital number, since it uses as much as digits as its factorization.

1531573100149 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56700, while the sum is 40.

The spelling of 1531573100149 in words is "one trillion, five hundred thirty-one billion, five hundred seventy-three million, one hundred thousand, one hundred forty-nine".