662531213 has 8 divisors (see below), whose sum is σ = 681763320. Its totient is φ = 643368960.

The previous prime is 662531189. The next prime is 662531231. The reversal of 662531213 is 312135266.

It can be written as a sum of positive squares in 4 ways, for example, as 366071689 + 296459524 = 19133^2 + 17218^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 662531213 - 2¹⁴ = 662514829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (662530213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2093 + ... + 36461.

It is an arithmetic number, because the mean of its divisors is an integer number (85220415).

Almost surely, 2^662531213 is an apocalyptic number.

It is an amenable number.

662531213 is a deficient number, since it is larger than the sum of its proper divisors (19232107).

662531213 is a wasteful number, since it uses less digits than its factorization.

662531213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34927.

The product of its digits is 6480, while the sum is 29.

The square root of 662531213 is about 25739.6816802384. The cubic root of 662531213 is about 871.7703910550.

Adding to 662531213 its reverse (312135266), we get a palindrome (974666479).

The spelling of 662531213 in words is "six hundred sixty-two million, five hundred thirty-one thousand, two hundred thirteen".