315345421 has 4 divisors (see below), whose sum is σ = 315406912. Its totient is φ = 315283932.

The previous prime is 315345409. The next prime is 315345431. The reversal of 315345421 is 124543513.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 315345421 - 2¹³ = 315337229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 315345421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315345431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22275 + ... + 33568.

It is an arithmetic number, because the mean of its divisors is an integer number (78851728).

Almost surely, 2^315345421 is an apocalyptic number.

It is an amenable number.

315345421 is a deficient number, since it is larger than the sum of its proper divisors (61491).

315345421 is an equidigital number, since it uses as much as digits as its factorization.

315345421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61490.

The product of its digits is 7200, while the sum is 28.

The square root of 315345421 is about 17757.9678172926. The cubic root of 315345421 is about 680.6578272293.

Adding to 315345421 its reverse (124543513), we get a palindrome (439888934).

The spelling of 315345421 in words is "three hundred fifteen million, three hundred forty-five thousand, four hundred twenty-one".