1061561533 has 2 divisors, whose sum is σ = 1061561534. Its totient is φ = 1061561532.

The previous prime is 1061561509. The next prime is 1061561581. The reversal of 1061561533 is 3351651601.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1052483364 + 9078169 = 32442^2 + 3013^2 .

It is an emirp because it is prime and its reverse (3351651601) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1061561533 is a prime.

It is a super-2 number, since 2×1061561533² = 2253825776690620178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1061561495 and 1061561504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1061561593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530780766 + 530780767.

It is an arithmetic number, because the mean of its divisors is an integer number (530780767).

Almost surely, 2^1061561533 is an apocalyptic number.

It is an amenable number.

1061561533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1061561533 is an equidigital number, since it uses as much as digits as its factorization.

1061561533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 1061561533 is about 32581.6134192277. The cubic root of 1061561533 is about 1020.1132557184.

The spelling of 1061561533 in words is "one billion, sixty-one million, five hundred sixty-one thousand, five hundred thirty-three".