216012541 has 2 divisors, whose sum is σ = 216012542. Its totient is φ = 216012540.

The previous prime is 216012509. The next prime is 216012547. The reversal of 216012541 is 145210612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214622500 + 1390041 = 14650^2 + 1179^2 .

It is a cyclic number.

It is not a de Polignac number, because 216012541 - 2⁵ = 216012509 is a prime.

It is a super-2 number, since 2×216012541² = 93322835738553362, which contains 22 as substring.

It is a Chen prime.

It is equal to p_11915050 and since 216012541 and 11915050 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216012547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108006270 + 108006271.

It is an arithmetic number, because the mean of its divisors is an integer number (108006271).

Almost surely, 2^216012541 is an apocalyptic number.

It is an amenable number.

216012541 is a deficient number, since it is larger than the sum of its proper divisors (1).

216012541 is an equidigital number, since it uses as much as digits as its factorization.

216012541 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 216012541 is about 14697.3651039906. The cubic root of 216012541 is about 600.0116118123.

It can be divided in two parts, 21601 and 2541, that added together give a palindrome (24142).

The spelling of 216012541 in words is "two hundred sixteen million, twelve thousand, five hundred forty-one".