213000451 has 4 divisors (see below), whose sum is σ = 213548400. Its totient is φ = 212452504.

The previous prime is 213000433. The next prime is 213000461. The reversal of 213000451 is 154000312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213000451 - 2⁵ = 213000419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213000421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273391 + ... + 274168.

It is an arithmetic number, because the mean of its divisors is an integer number (53387100).

Almost surely, 2^213000451 is an apocalyptic number.

213000451 is a deficient number, since it is larger than the sum of its proper divisors (547949).

213000451 is an equidigital number, since it uses as much as digits as its factorization.

213000451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547948.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 213000451 is about 14594.5349703237. The cubic root of 213000451 is about 597.2096834868.

Adding to 213000451 its reverse (154000312), we get a palindrome (367000763).

The spelling of 213000451 in words is "two hundred thirteen million, four hundred fifty-one", and thus it is an aban number.