214216531 has 2 divisors, whose sum is σ = 214216532. Its totient is φ = 214216530.

The previous prime is 214216523. The next prime is 214216547. The reversal of 214216531 is 135612412.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 214216531 - 2³ = 214216523 is a prime.

It is a super-2 number, since 2×214216531² = 91777444307347922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 214216496 and 214216505.

It is not a weakly prime, because it can be changed into another prime (214216631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107108265 + 107108266.

It is an arithmetic number, because the mean of its divisors is an integer number (107108266).

Almost surely, 2^214216531 is an apocalyptic number.

214216531 is a deficient number, since it is larger than the sum of its proper divisors (1).

214216531 is an equidigital number, since it uses as much as digits as its factorization.

214216531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 25.

The square root of 214216531 is about 14636.1378443905. The cubic root of 214216531 is about 598.3440738669.

Adding to 214216531 its reverse (135612412), we get a palindrome (349828943).

The spelling of 214216531 in words is "two hundred fourteen million, two hundred sixteen thousand, five hundred thirty-one".