213246891 has 48 divisors (see below), whose sum is σ = 374038560. Its totient is φ = 119275200.

The previous prime is 213246877. The next prime is 213246907. The reversal of 213246891 is 198642312.

It is not a de Polignac number, because 213246891 - 2⁷ = 213246763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213246811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39961 + ... + 44981.

It is an arithmetic number, because the mean of its divisors is an integer number (7792470).

Almost surely, 2^213246891 is an apocalyptic number.

213246891 is a deficient number, since it is larger than the sum of its proper divisors (160791669).

213246891 is a wasteful number, since it uses less digits than its factorization.

213246891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5065 (or 5048 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 213246891 is about 14602.9754159897. The cubic root of 213246891 is about 597.4399171624.

The spelling of 213246891 in words is "two hundred thirteen million, two hundred forty-six thousand, eight hundred ninety-one".