1219530697531 has 2 divisors, whose sum is σ = 1219530697532. Its totient is φ = 1219530697530.

The previous prime is 1219530697513. The next prime is 1219530697543. The reversal of 1219530697531 is 1357960359121.

Together with previous prime (1219530697513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1219530697531 - 2¹¹ = 1219530695483 is a prime.

It is a super-2 number, since 2×1219530697531² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1219530697031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609765348765 + 609765348766.

It is an arithmetic number, because the mean of its divisors is an integer number (609765348766).

Almost surely, 2^{1219530697531} is an apocalyptic number.

1219530697531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1219530697531 is an equidigital number, since it uses as much as digits as its factorization.

1219530697531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1530900, while the sum is 52.

The spelling of 1219530697531 in words is "one trillion, two hundred nineteen billion, five hundred thirty million, six hundred ninety-seven thousand, five hundred thirty-one".