15214987 has 2 divisors, whose sum is σ = 15214988. Its totient is φ = 15214986.

The previous prime is 15214967. The next prime is 15214993. The reversal of 15214987 is 78941251.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15214987 is a prime.

It is not a weakly prime, because it can be changed into another prime (15214907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7607493 + 7607494.

It is an arithmetic number, because the mean of its divisors is an integer number (7607494).

Almost surely, 2^15214987 is an apocalyptic number.

15214987 is a deficient number, since it is larger than the sum of its proper divisors (1).

15214987 is an equidigital number, since it uses as much as digits as its factorization.

15214987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The square root of 15214987 is about 3900.6393065753. The cubic root of 15214987 is about 247.7938529271.

The spelling of 15214987 in words is "fifteen million, two hundred fourteen thousand, nine hundred eighty-seven".