15051661 has 2 divisors, whose sum is σ = 15051662. Its totient is φ = 15051660.

The previous prime is 15051643. The next prime is 15051671. The reversal of 15051661 is 16615051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14402025 + 649636 = 3795^2 + 806^2 .

It is an emirp because it is prime and its reverse (16615051) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15051661 - 2⁹ = 15051149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15051601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7525830 + 7525831.

It is an arithmetic number, because the mean of its divisors is an integer number (7525831).

Almost surely, 2^15051661 is an apocalyptic number.

It is an amenable number.

15051661 is a deficient number, since it is larger than the sum of its proper divisors (1).

15051661 is an equidigital number, since it uses as much as digits as its factorization.

15051661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 15051661 is about 3879.6470200264. The cubic root of 15051661 is about 246.9040096445.

The spelling of 15051661 in words is "fifteen million, fifty-one thousand, six hundred sixty-one".