331730473 has 6 divisors (see below), whose sum is σ = 342777642. Its totient is φ = 321028560.

The previous prime is 331730459. The next prime is 331730479. The reversal of 331730473 is 374037133.

It can be written as a sum of positive squares in only one way, i.e., 304607209 + 27123264 = 17453^2 + 5208^2 .

It is not a de Polignac number, because 331730473 - 2⁹ = 331729961 is a prime.

It is a super-2 number, since 2×331730473² = 220090213433607458, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (331730479) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 171636 + ... + 173557.

It is an arithmetic number, because the mean of its divisors is an integer number (57129607).

Almost surely, 2^331730473 is an apocalyptic number.

It is an amenable number.

331730473 is a deficient number, since it is larger than the sum of its proper divisors (11047169).

331730473 is an equidigital number, since it uses as much as digits as its factorization.

331730473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345255 (or 345224 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 31.

The square root of 331730473 is about 18213.4695486610. The cubic root of 331730473 is about 692.2481269363.

The spelling of 331730473 in words is "three hundred thirty-one million, seven hundred thirty thousand, four hundred seventy-three".