302431421 has 4 divisors (see below), whose sum is σ = 302467452. Its totient is φ = 302395392.

The previous prime is 302431403. The next prime is 302431429. The reversal of 302431421 is 124134203.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 104325796 + 198105625 = 10214^2 + 14075^2 .

It is a cyclic number.

It is not a de Polignac number, because 302431421 - 2⁶ = 302431357 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 302431393 and 302431402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (302431429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1955 + ... + 24671.

It is an arithmetic number, because the mean of its divisors is an integer number (75616863).

Almost surely, 2^302431421 is an apocalyptic number.

It is an amenable number.

302431421 is a deficient number, since it is larger than the sum of its proper divisors (36031).

302431421 is a wasteful number, since it uses less digits than its factorization.

302431421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36030.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 302431421 is about 17390.5555115413. Note that the first 4 decimals coincide. The cubic root of 302431421 is about 671.2366120133.

Adding to 302431421 its reverse (124134203), we get a palindrome (426565624).

The spelling of 302431421 in words is "three hundred two million, four hundred thirty-one thousand, four hundred twenty-one".