213320131987 has 2 divisors, whose sum is σ = 213320131988. Its totient is φ = 213320131986.

The previous prime is 213320131931. The next prime is 213320131993. The reversal of 213320131987 is 789131023312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213320131987 - 2²⁷ = 213185914259 is a prime.

It is a super-2 number, since 2×213320131987² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (213320101987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106660065993 + 106660065994.

It is an arithmetic number, because the mean of its divisors is an integer number (106660065994).

Almost surely, 2^213320131987 is an apocalyptic number.

213320131987 is a deficient number, since it is larger than the sum of its proper divisors (1).

213320131987 is an equidigital number, since it uses as much as digits as its factorization.

213320131987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 40.

The spelling of 213320131987 in words is "two hundred thirteen billion, three hundred twenty million, one hundred thirty-one thousand, nine hundred eighty-seven".