213491088 has 30 divisors (see below), whose sum is σ = 597478934. Its totient is φ = 71163648.

The previous prime is 213491081. The next prime is 213491111. The reversal of 213491088 is 880194312.

213491088 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 183548304 + 29942784 = 13548^2 + 5472^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213491081) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 741145 + ... + 741432.

Almost surely, 2^213491088 is an apocalyptic number.

It is an amenable number.

213491088 is an abundant number, since it is smaller than the sum of its proper divisors (383987846).

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

213491088 is a wasteful number, since it uses less digits than its factorization.

213491088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482591 (or 1482582 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 213491088 is about 14611.3342306581. The cubic root of 213491088 is about 597.6678804416.

The spelling of 213491088 in words is "two hundred thirteen million, four hundred ninety-one thousand, eighty-eight".