15961567 has 2 divisors, whose sum is σ = 15961568. Its totient is φ = 15961566.

The previous prime is 15961549. The next prime is 15961579. The reversal of 15961567 is 76516951.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15961567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15961507) 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, 7980783 + 7980784.

It is an arithmetic number, because the mean of its divisors is an integer number (7980784).

Almost surely, 2^15961567 is an apocalyptic number.

15961567 is a deficient number, since it is larger than the sum of its proper divisors (1).

15961567 is an equidigital number, since it uses as much as digits as its factorization.

15961567 is an odious number, because the sum of its binary digits is odd.

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

The square root of 15961567 is about 3995.1929865777. The cubic root of 15961567 is about 251.7822876087.

The spelling of 15961567 in words is "fifteen million, nine hundred sixty-one thousand, five hundred sixty-seven".