213320131988 has 6 divisors (see below), whose sum is σ = 373310230986. Its totient is φ = 106660065992.

The previous prime is 213320131987. The next prime is 213320131993. The reversal of 213320131988 is 889131023312.

It can be written as a sum of positive squares in only one way, i.e., 114580896004 + 98739235984 = 338498^2 + 314228^2 .

It is a super-2 number, since 2×213320131988² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213320131987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26665016495 + ... + 26665016502.

It is an arithmetic number, because the mean of its divisors is an integer number (62218371831).

Almost surely, 2^213320131988 is an apocalyptic number.

It is an amenable number.

213320131988 is a deficient number, since it is larger than the sum of its proper divisors (159990098998).

213320131988 is a wasteful number, since it uses less digits than its factorization.

213320131988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53330033001 (or 53330032999 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The spelling of 213320131988 in words is "two hundred thirteen billion, three hundred twenty million, one hundred thirty-one thousand, nine hundred eighty-eight".