315421133 has 2 divisors, whose sum is σ = 315421134. Its totient is φ = 315421132.

The previous prime is 315421129. The next prime is 315421177. The reversal of 315421133 is 331124513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 314956009 + 465124 = 17747^2 + 682^2 .

It is an emirp because it is prime and its reverse (331124513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 315421133 - 2² = 315421129 is a prime.

It is a super-2 number, since 2×315421133² = 198980982286007378, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 315421099 and 315421108.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (315421433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157710566 + 157710567.

It is an arithmetic number, because the mean of its divisors is an integer number (157710567).

Almost surely, 2^315421133 is an apocalyptic number.

It is an amenable number.

315421133 is a deficient number, since it is larger than the sum of its proper divisors (1).

315421133 is an equidigital number, since it uses as much as digits as its factorization.

315421133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 23.

The square root of 315421133 is about 17760.0994648116. The cubic root of 315421133 is about 680.7122964328.

Adding to 315421133 its reverse (331124513), we get a palindrome (646545646).

The spelling of 315421133 in words is "three hundred fifteen million, four hundred twenty-one thousand, one hundred thirty-three".