315121045 has 32 divisors (see below), whose sum is σ = 418498560. Its totient is φ = 226955520.

The previous prime is 315121043. The next prime is 315121063. The reversal of 315121045 is 540121513.

It is a happy number.

It is not a de Polignac number, because 315121045 - 2¹ = 315121043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315121043) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130711 + ... + 133099.

It is an arithmetic number, because the mean of its divisors is an integer number (13078080).

Almost surely, 2^315121045 is an apocalyptic number.

It is an amenable number.

315121045 is a deficient number, since it is larger than the sum of its proper divisors (103377515).

315121045 is a wasteful number, since it uses less digits than its factorization.

315121045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2485.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 315121045 is about 17751.6490783251. The cubic root of 315121045 is about 680.4963540141.

Adding to 315121045 its reverse (540121513), we get a palindrome (855242558).

The spelling of 315121045 in words is "three hundred fifteen million, one hundred twenty-one thousand, forty-five".