315233421 has 8 divisors (see below), whose sum is σ = 427201824. Its totient is φ = 206710320.

The previous prime is 315233407. The next prime is 315233437. The reversal of 315233421 is 124332513.

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

It is not a de Polignac number, because 315233421 - 2⁹ = 315232909 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 315233391 and 315233400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315233441) 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, 861111 + ... + 861476.

It is an arithmetic number, because the mean of its divisors is an integer number (53400228).

Almost surely, 2^315233421 is an apocalyptic number.

It is an amenable number.

315233421 is a deficient number, since it is larger than the sum of its proper divisors (111968403).

315233421 is a wasteful number, since it uses less digits than its factorization.

315233421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1722651.

The product of its digits is 2160, while the sum is 24.

The square root of 315233421 is about 17754.8140232445. The cubic root of 315233421 is about 680.5772354945.

Adding to 315233421 its reverse (124332513), we get a palindrome (439565934).

The spelling of 315233421 in words is "three hundred fifteen million, two hundred thirty-three thousand, four hundred twenty-one".