213091587 has 16 divisors (see below), whose sum is σ = 317968000. Its totient is φ = 141036552.

The previous prime is 213091579. The next prime is 213091591. The reversal of 213091587 is 785190312.

It is not a de Polignac number, because 213091587 - 2³ = 213091579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213091537) 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, 24637 + ... + 32142.

It is an arithmetic number, because the mean of its divisors is an integer number (19873000).

Almost surely, 2^213091587 is an apocalyptic number.

213091587 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

213091587 is a deficient number, since it is larger than the sum of its proper divisors (104876413).

213091587 is a wasteful number, since it uses less digits than its factorization.

213091587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56927 (or 56921 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 213091587 is about 14597.6569010235. The cubic root of 213091587 is about 597.2948469075.

The spelling of 213091587 in words is "two hundred thirteen million, ninety-one thousand, five hundred eighty-seven".