15228743 has 2 divisors, whose sum is σ = 15228744. Its totient is φ = 15228742.

The previous prime is 15228727. The next prime is 15228767. The reversal of 15228743 is 34782251.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 15228743 - 2⁴ = 15228727 is a prime.

It is a super-2 number, since 2×15228743² = 463829226720098, which contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15228713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7614371 + 7614372.

It is an arithmetic number, because the mean of its divisors is an integer number (7614372).

Almost surely, 2^15228743 is an apocalyptic number.

15228743 is a deficient number, since it is larger than the sum of its proper divisors (1).

15228743 is an equidigital number, since it uses as much as digits as its factorization.

15228743 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13440, while the sum is 32.

The square root of 15228743 is about 3902.4022088965. The cubic root of 15228743 is about 247.8685079474.

The spelling of 15228743 in words is "fifteen million, two hundred twenty-eight thousand, seven hundred forty-three".