7415540243 has 2 divisors, whose sum is σ = 7415540244. Its totient is φ = 7415540242.

The previous prime is 7415540227. The next prime is 7415540261. The reversal of 7415540243 is 3420455147.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7415540243 - 2⁴ = 7415540227 is a prime.

It is not a weakly prime, because it can be changed into another prime (7415540203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3707770121 + 3707770122.

It is an arithmetic number, because the mean of its divisors is an integer number (3707770122).

Almost surely, 2^7415540243 is an apocalyptic number.

7415540243 is a deficient number, since it is larger than the sum of its proper divisors (1).

7415540243 is an equidigital number, since it uses as much as digits as its factorization.

7415540243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 67200, while the sum is 35.

The square root of 7415540243 is about 86113.5311260664. The cubic root of 7415540243 is about 1950.0583145392.

The spelling of 7415540243 in words is "seven billion, four hundred fifteen million, five hundred forty thousand, two hundred forty-three".