15220663 has 2 divisors, whose sum is σ = 15220664. Its totient is φ = 15220662.

The previous prime is 15220637. The next prime is 15220669. The reversal of 15220663 is 36602251.

15220663 is nontrivially palindromic in base 13.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 15220663 - 2⁵ = 15220631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15220669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7610331 + 7610332.

It is an arithmetic number, because the mean of its divisors is an integer number (7610332).

Almost surely, 2^15220663 is an apocalyptic number.

15220663 is a deficient number, since it is larger than the sum of its proper divisors (1).

15220663 is an equidigital number, since it uses as much as digits as its factorization.

15220663 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 15220663 is about 3901.3668117725. The cubic root of 15220663 is about 247.8246625283.

The spelling of 15220663 in words is "fifteen million, two hundred twenty thousand, six hundred sixty-three".