315146421 has 12 divisors (see below), whose sum is σ = 464897472. Its totient is φ = 205627176.

The previous prime is 315146413. The next prime is 315146477. The reversal of 315146421 is 124641513.

It is a happy number.

315146421 is a `hidden beast` number, since 3 + 1 + 5 + 14 + 642 + 1 = 666.

It is not a de Polignac number, because 315146421 - 2³ = 315146413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315146401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 372091 + ... + 372936.

It is an arithmetic number, because the mean of its divisors is an integer number (38741456).

Almost surely, 2^315146421 is an apocalyptic number.

It is an amenable number.

315146421 is a deficient number, since it is larger than the sum of its proper divisors (149751051).

315146421 is a wasteful number, since it uses less digits than its factorization.

315146421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745080 (or 745077 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 315146421 is about 17752.3638144333. The cubic root of 315146421 is about 680.5146198120.

Adding to 315146421 its reverse (124641513), we get a palindrome (439787934).

The spelling of 315146421 in words is "three hundred fifteen million, one hundred forty-six thousand, four hundred twenty-one".