213451241 has 4 divisors (see below), whose sum is σ = 213507984. Its totient is φ = 213394500.

The previous prime is 213451229. The next prime is 213451243. The reversal of 213451241 is 142154312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 213451241 - 2⁶ = 213451177 is a prime.

It is a super-2 number, since 2×213451241² = 91122864568880162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213451243) 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, 22295 + ... + 30396.

It is an arithmetic number, because the mean of its divisors is an integer number (53376996).

Almost surely, 2^213451241 is an apocalyptic number.

It is an amenable number.

213451241 is a deficient number, since it is larger than the sum of its proper divisors (56743).

213451241 is an equidigital number, since it uses as much as digits as its factorization.

213451241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56742.

The product of its digits is 960, while the sum is 23.

The square root of 213451241 is about 14609.9706022976. The cubic root of 213451241 is about 597.6306942620.

The spelling of 213451241 in words is "two hundred thirteen million, four hundred fifty-one thousand, two hundred forty-one".