213049491 has 16 divisors (see below), whose sum is σ = 304588800. Its totient is φ = 131983488.

The previous prime is 213049469. The next prime is 213049511. The reversal of 213049491 is 194940312.

It is not a de Polignac number, because 213049491 - 2⁶ = 213049427 is a prime.

It is a super-3 number, since 3×213049491³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (213049411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22411 + ... + 30468.

It is an arithmetic number, because the mean of its divisors is an integer number (19036800).

Almost surely, 2^213049491 is an apocalyptic number.

213049491 is a deficient number, since it is larger than the sum of its proper divisors (91539309).

213049491 is a wasteful number, since it uses less digits than its factorization.

213049491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52978.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 213049491 is about 14596.2149545696. The cubic root of 213049491 is about 597.2555126786.

The spelling of 213049491 in words is "two hundred thirteen million, forty-nine thousand, four hundred ninety-one".