1331640213 has 16 divisors (see below), whose sum is σ = 1874009280. Its totient is φ = 838767744.

The previous prime is 1331640203. The next prime is 1331640217. The reversal of 1331640213 is 3120461331.

It is a happy number.

It is not a de Polignac number, because 1331640213 - 2⁴ = 1331640197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331640217) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10056 + ... + 52577.

It is an arithmetic number, because the mean of its divisors is an integer number (117125580).

Almost surely, 2^1331640213 is an apocalyptic number.

It is an amenable number.

1331640213 is a deficient number, since it is larger than the sum of its proper divisors (542369067).

1331640213 is a wasteful number, since it uses less digits than its factorization.

1331640213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63028.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 1331640213 is about 36491.6457973603. The cubic root of 1331640213 is about 1100.1763389476.

The spelling of 1331640213 in words is "one billion, three hundred thirty-one million, six hundred forty thousand, two hundred thirteen".