315442129 has 2 divisors, whose sum is σ = 315442130. Its totient is φ = 315442128.

The previous prime is 315442121. The next prime is 315442139. The reversal of 315442129 is 921244513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 309056400 + 6385729 = 17580^2 + 2527^2 .

It is a cyclic number.

It is not a de Polignac number, because 315442129 - 2³ = 315442121 is a prime.

It is a super-3 number, since 3×315442129³ (a number of 26 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 315442129.

It is not a weakly prime, because it can be changed into another prime (315442121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157721064 + 157721065.

It is an arithmetic number, because the mean of its divisors is an integer number (157721065).

Almost surely, 2^315442129 is an apocalyptic number.

It is an amenable number.

315442129 is a deficient number, since it is larger than the sum of its proper divisors (1).

315442129 is an equidigital number, since it uses as much as digits as its factorization.

315442129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 315442129 is about 17760.6905552684. The cubic root of 315442129 is about 680.7273999634.

The spelling of 315442129 in words is "three hundred fifteen million, four hundred forty-two thousand, one hundred twenty-nine".