213025451 has 4 divisors (see below), whose sum is σ = 213657912. Its totient is φ = 212392992.

The previous prime is 213025447. The next prime is 213025513. The reversal of 213025451 is 154520312.

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 213025451 - 2² = 213025447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213021451) 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 3 ways as a sum of consecutive naturals, for example, 315725 + ... + 316398.

It is an arithmetic number, because the mean of its divisors is an integer number (53414478).

Almost surely, 2^213025451 is an apocalyptic number.

213025451 is a deficient number, since it is larger than the sum of its proper divisors (632461).

213025451 is an equidigital number, since it uses as much as digits as its factorization.

213025451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632460.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 213025451 is about 14595.3914301741. The cubic root of 213025451 is about 597.2330475344.

Adding to 213025451 its reverse (154520312), we get a palindrome (367545763).

The spelling of 213025451 in words is "two hundred thirteen million, twenty-five thousand, four hundred fifty-one".