213314551 has 2 divisors, whose sum is σ = 213314552. Its totient is φ = 213314550.

The previous prime is 213314483. The next prime is 213314561. The reversal of 213314551 is 155413312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 213314551 - 2²¹ = 211217399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213314561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106657275 + 106657276.

It is an arithmetic number, because the mean of its divisors is an integer number (106657276).

Almost surely, 2^213314551 is an apocalyptic number.

213314551 is a deficient number, since it is larger than the sum of its proper divisors (1).

213314551 is an equidigital number, since it uses as much as digits as its factorization.

213314551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1800, while the sum is 25.

The square root of 213314551 is about 14605.2918834236. The cubic root of 213314551 is about 597.5030966851.

Adding to 213314551 its reverse (155413312), we get a palindrome (368727863).

The spelling of 213314551 in words is "two hundred thirteen million, three hundred fourteen thousand, five hundred fifty-one".