15220739 has 2 divisors, whose sum is σ = 15220740. Its totient is φ = 15220738.

The previous prime is 15220703. The next prime is 15220741. The reversal of 15220739 is 93702251.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15220739 is a prime.

It is a super-2 number, since 2×15220739² = 463341791412242, which contains 22 as substring.

Together with 15220741, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (15223739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7610369 + 7610370.

It is an arithmetic number, because the mean of its divisors is an integer number (7610370).

Almost surely, 2^15220739 is an apocalyptic number.

15220739 is a deficient number, since it is larger than the sum of its proper divisors (1).

15220739 is an equidigital number, since it uses as much as digits as its factorization.

15220739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 15220739 is about 3901.3765519365. The cubic root of 15220739 is about 247.8250750080.

The spelling of 15220739 in words is "fifteen million, two hundred twenty thousand, seven hundred thirty-nine".