315211421 has 8 divisors (see below), whose sum is σ = 360627264. Its totient is φ = 269892000.

The previous prime is 315211417. The next prime is 315211427. The reversal of 315211421 is 124112513.

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

It is not a de Polignac number, because 315211421 - 2² = 315211417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 315211393 and 315211402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315211427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16955 + ... + 30296.

It is an arithmetic number, because the mean of its divisors is an integer number (45078408).

Almost surely, 2^315211421 is an apocalyptic number.

It is an amenable number.

315211421 is a deficient number, since it is larger than the sum of its proper divisors (45415843).

315211421 is an equidigital number, since it uses as much as digits as its factorization.

315211421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48211.

The product of its digits is 240, while the sum is 20.

The square root of 315211421 is about 17754.1944621546. The cubic root of 315211421 is about 680.5614027322.

Adding to 315211421 its reverse (124112513), we get a palindrome (439323934).

The spelling of 315211421 in words is "three hundred fifteen million, two hundred eleven thousand, four hundred twenty-one".