1056105505531 has 2 divisors, whose sum is σ = 1056105505532. Its totient is φ = 1056105505530.

The previous prime is 1056105505519. The next prime is 1056105505541. The reversal of 1056105505531 is 1355055016501.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1056105505531 is a prime.

It is a super-2 number, since 2×1056105505531² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1056105505541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 528052752765 + 528052752766.

It is an arithmetic number, because the mean of its divisors is an integer number (528052752766).

Almost surely, 2^{1056105505531} is an apocalyptic number.

1056105505531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1056105505531 is an equidigital number, since it uses as much as digits as its factorization.

1056105505531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56250, while the sum is 37.

The spelling of 1056105505531 in words is "one trillion, fifty-six billion, one hundred five million, five hundred five thousand, five hundred thirty-one".