15151561 has 2 divisors, whose sum is σ = 15151562. Its totient is φ = 15151560.

The previous prime is 15151547. The next prime is 15151571. The reversal of 15151561 is 16515151.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13461561 + 1690000 = 3669^2 + 1300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15151561 is a prime.

It is not a weakly prime, because it can be changed into another prime (15151541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7575780 + 7575781.

It is an arithmetic number, because the mean of its divisors is an integer number (7575781).

Almost surely, 2^15151561 is an apocalyptic number.

It is an amenable number.

15151561 is a deficient number, since it is larger than the sum of its proper divisors (1).

15151561 is an equidigital number, since it uses as much as digits as its factorization.

15151561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 750, while the sum is 25.

The square root of 15151561 is about 3892.5006101477. The cubic root of 15151561 is about 247.4490511731.

The spelling of 15151561 in words is "fifteen million, one hundred fifty-one thousand, five hundred sixty-one".