213991036 has 36 divisors (see below), whose sum is σ = 461256768. Its totient is φ = 86314368.

The previous prime is 213991033. The next prime is 213991039. The reversal of 213991036 is 630199312.

It is an interprime number because it is at equal distance from previous prime (213991033) and next prime (213991039).

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a junction number, because it is equal to n+sod(n) for n = 213990992 and 213991010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213991033) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28780 + ... + 35443.

It is an arithmetic number, because the mean of its divisors is an integer number (12812688).

Almost surely, 2^213991036 is an apocalyptic number.

It is an amenable number.

213991036 is an abundant number, since it is smaller than the sum of its proper divisors (247265732).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213991036 is a wasteful number, since it uses less digits than its factorization.

213991036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64258 (or 64249 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 213991036 is about 14628.4324519068. The cubic root of 213991036 is about 598.1340512223.

The spelling of 213991036 in words is "two hundred thirteen million, nine hundred ninety-one thousand, thirty-six".