315023421 has 8 divisors (see below), whose sum is σ = 424751040. Its totient is φ = 207655712.

The previous prime is 315023411. The next prime is 315023453. The reversal of 315023421 is 124320513.

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 315023421 - 2⁵ = 315023389 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315023411) 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, 589665 + ... + 590198.

It is an arithmetic number, because the mean of its divisors is an integer number (53093880).

Almost surely, 2^315023421 is an apocalyptic number.

It is an amenable number.

315023421 is a deficient number, since it is larger than the sum of its proper divisors (109727619).

315023421 is a wasteful number, since it uses less digits than its factorization.

315023421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179955.

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

The square root of 315023421 is about 17748.8991489613. The cubic root of 315023421 is about 680.4260745257.

Adding to 315023421 its reverse (124320513), we get a palindrome (439343934).

The spelling of 315023421 in words is "three hundred fifteen million, twenty-three thousand, four hundred twenty-one".