213125474 has 8 divisors (see below), whose sum is σ = 320932908. Its totient is φ = 106147840.

The previous prime is 213125443. The next prime is 213125519. The reversal of 213125474 is 474521312.

It can be written as a sum of positive squares in 2 ways, for example, as 142683025 + 70442449 = 11945^2 + 8393^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 206807 + ... + 207834.

Almost surely, 2^213125474 is an apocalyptic number.

213125474 is a deficient number, since it is larger than the sum of its proper divisors (107807434).

213125474 is a wasteful number, since it uses less digits than its factorization.

213125474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414900.

The product of its digits is 6720, while the sum is 29.

The square root of 213125474 is about 14598.8175548570. The cubic root of 213125474 is about 597.3265069367.

Adding to 213125474 its reverse (474521312), we get a palindrome (687646786).

The spelling of 213125474 in words is "two hundred thirteen million, one hundred twenty-five thousand, four hundred seventy-four".