213128777587 has 8 divisors (see below), whose sum is σ = 232507482480. Its totient is φ = 193750632960.

The previous prime is 213128777579. The next prime is 213128777627. The reversal of 213128777587 is 785777821312.

It is a happy number.

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 213128777587 - 2³ = 213128777579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213128777507) 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, 1291839 + ... + 1447447.

It is an arithmetic number, because the mean of its divisors is an integer number (29063435310).

Almost surely, 2^213128777587 is an apocalyptic number.

213128777587 is a deficient number, since it is larger than the sum of its proper divisors (19378704893).

213128777587 is a wasteful number, since it uses less digits than its factorization.

213128777587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280133.

The product of its digits is 9219840, while the sum is 58.

The spelling of 213128777587 in words is "two hundred thirteen billion, one hundred twenty-eight million, seven hundred seventy-seven thousand, five hundred eighty-seven".