213226491 has 16 divisors (see below), whose sum is σ = 297239040. Its totient is φ = 135706560.

The previous prime is 213226487. The next prime is 213226499. The reversal of 213226491 is 194622312.

It is not a de Polignac number, because 213226491 - 2² = 213226487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (213226499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36546 + ... + 41976.

It is an arithmetic number, because the mean of its divisors is an integer number (18577440).

Almost surely, 2^213226491 is an apocalyptic number.

213226491 is a deficient number, since it is larger than the sum of its proper divisors (84012549).

213226491 is a wasteful number, since it uses less digits than its factorization.

213226491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6026.

The product of its digits is 5184, while the sum is 30.

The square root of 213226491 is about 14602.2769114957. The cubic root of 213226491 is about 597.4208654380.

The spelling of 213226491 in words is "two hundred thirteen million, two hundred twenty-six thousand, four hundred ninety-one".