315234021 has 8 divisors (see below), whose sum is σ = 438586560. Its totient is φ = 201018752.

The previous prime is 315234011. The next prime is 315234037. The reversal of 315234021 is 120432513.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 315234021 - 2⁶ = 315233957 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315234001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2284236 + ... + 2284373.

It is an arithmetic number, because the mean of its divisors is an integer number (54823320).

Almost surely, 2^315234021 is an apocalyptic number.

It is an amenable number.

315234021 is a deficient number, since it is larger than the sum of its proper divisors (123352539).

315234021 is a wasteful number, since it uses less digits than its factorization.

315234021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4568635.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 315234021 is about 17754.8309200623. The cubic root of 315234021 is about 680.5776672868.

Adding to 315234021 its reverse (120432513), we get a palindrome (435666534).

It can be divided in two parts, 3152 and 34021, that added together give a palindrome (37173).

The spelling of 315234021 in words is "three hundred fifteen million, two hundred thirty-four thousand, twenty-one".