1061611531 has 2 divisors, whose sum is σ = 1061611532. Its totient is φ = 1061611530.

The previous prime is 1061611451. The next prime is 1061611543. The reversal of 1061611531 is 1351161601.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1061611531 is a prime.

It is a super-2 number, since 2×1061611531² = 2254038085504327922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1061611496 and 1061611505.

It is not a weakly prime, because it can be changed into another prime (1061611561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 530805765 + 530805766.

It is an arithmetic number, because the mean of its divisors is an integer number (530805766).

Almost surely, 2^1061611531 is an apocalyptic number.

1061611531 is a deficient number, since it is larger than the sum of its proper divisors (1).

1061611531 is an equidigital number, since it uses as much as digits as its factorization.

1061611531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 1061611531 is about 32582.3806834307. The cubic root of 1061611531 is about 1020.1292707492.

The spelling of 1061611531 in words is "one billion, sixty-one million, six hundred eleven thousand, five hundred thirty-one".