15225407 has 2 divisors, whose sum is σ = 15225408. Its totient is φ = 15225406.

The previous prime is 15225401. The next prime is 15225439. The reversal of 15225407 is 70452251.

It is a weak prime.

It is an emirp because it is prime and its reverse (70452251) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-15225407 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15225401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7612703 + 7612704.

It is an arithmetic number, because the mean of its divisors is an integer number (7612704).

Almost surely, 2^15225407 is an apocalyptic number.

15225407 is a deficient number, since it is larger than the sum of its proper divisors (1).

15225407 is an equidigital number, since it uses as much as digits as its factorization.

15225407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 15225407 is about 3901.9747564535. The cubic root of 15225407 is about 247.8504073130.

Adding to 15225407 its reverse (70452251), we get a palindrome (85677658).

The spelling of 15225407 in words is "fifteen million, two hundred twenty-five thousand, four hundred seven".