15113551 has 2 divisors, whose sum is σ = 15113552. Its totient is φ = 15113550.

The previous prime is 15113537. The next prime is 15113573. The reversal of 15113551 is 15531151.

It is an a-pointer prime, because the next prime (15113573) can be obtained adding 15113551 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15113551 - 2¹³ = 15105359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15116551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7556775 + 7556776.

It is an arithmetic number, because the mean of its divisors is an integer number (7556776).

Almost surely, 2^15113551 is an apocalyptic number.

15113551 is a deficient number, since it is larger than the sum of its proper divisors (1).

15113551 is an equidigital number, since it uses as much as digits as its factorization.

15113551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 375, while the sum is 22.

The square root of 15113551 is about 3887.6150786826. The cubic root of 15113551 is about 247.2419566810.

The spelling of 15113551 in words is "fifteen million, one hundred thirteen thousand, five hundred fifty-one".