331421473 has 2 divisors, whose sum is σ = 331421474. Its totient is φ = 331421472.

The previous prime is 331421471. The next prime is 331421507. The reversal of 331421473 is 374124133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 279825984 + 51595489 = 16728^2 + 7183^2 .

It is a cyclic number.

It is not a de Polignac number, because 331421473 - 2¹ = 331421471 is a prime.

Together with 331421471, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (331421471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165710736 + 165710737.

It is an arithmetic number, because the mean of its divisors is an integer number (165710737).

Almost surely, 2^331421473 is an apocalyptic number.

It is an amenable number.

331421473 is a deficient number, since it is larger than the sum of its proper divisors (1).

331421473 is an equidigital number, since it uses as much as digits as its factorization.

331421473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048, while the sum is 28.

The square root of 331421473 is about 18204.9848393235. The cubic root of 331421473 is about 692.0331219459.

The spelling of 331421473 in words is "three hundred thirty-one million, four hundred twenty-one thousand, four hundred seventy-three".