213498891 has 12 divisors (see below), whose sum is σ = 318335680. Its totient is φ = 137741040.

The previous prime is 213498889. The next prime is 213498907. The reversal of 213498891 is 198894312.

It is not a de Polignac number, because 213498891 - 2¹ = 213498889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213498851) 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, 382336 + ... + 382893.

Almost surely, 2^213498891 is an apocalyptic number.

213498891 is a deficient number, since it is larger than the sum of its proper divisors (104836789).

213498891 is a wasteful number, since it uses less digits than its factorization.

213498891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765266 (or 765263 counting only the distinct ones).

The product of its digits is 124416, while the sum is 45.

The square root of 213498891 is about 14611.6012469544. The cubic root of 213498891 is about 597.6751618473.

It can be divided in two parts, 2134 and 98891, that added together give a triangular number (101025 = T₄₄₉).

The spelling of 213498891 in words is "two hundred thirteen million, four hundred ninety-eight thousand, eight hundred ninety-one".