213331521451 has 2 divisors, whose sum is σ = 213331521452. Its totient is φ = 213331521450.

The previous prime is 213331521413. The next prime is 213331521511. The reversal of 213331521451 is 154125133312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213331521451 - 2¹³ = 213331513259 is a prime.

It is not a weakly prime, because it can be changed into another prime (213331521251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106665760725 + 106665760726.

It is an arithmetic number, because the mean of its divisors is an integer number (106665760726).

Almost surely, 2^213331521451 is an apocalyptic number.

213331521451 is a deficient number, since it is larger than the sum of its proper divisors (1).

213331521451 is an equidigital number, since it uses as much as digits as its factorization.

213331521451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 31.

Adding to 213331521451 its reverse (154125133312), we get a palindrome (367456654763).

The spelling of 213331521451 in words is "two hundred thirteen billion, three hundred thirty-one million, five hundred twenty-one thousand, four hundred fifty-one".