312421730 has 8 divisors (see below), whose sum is σ = 562359132. Its totient is φ = 124968688.

The previous prime is 312421729. The next prime is 312421741. The reversal of 312421730 is 37124213.

It can be written as a sum of positive squares in 2 ways, for example, as 308669761 + 3751969 = 17569^2 + 1937^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 312421696 and 312421705.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15621077 + ... + 15621096.

Almost surely, 2^312421730 is an apocalyptic number.

312421730 is a deficient number, since it is larger than the sum of its proper divisors (249937402).

312421730 is a wasteful number, since it uses less digits than its factorization.

312421730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31242180.

The product of its (nonzero) digits is 1008, while the sum is 23.

The square root of 312421730 is about 17675.4555811159. The cubic root of 312421730 is about 678.5477440935.

Adding to 312421730 its reverse (37124213), we get a palindrome (349545943).

The spelling of 312421730 in words is "three hundred twelve million, four hundred twenty-one thousand, seven hundred thirty".