216341437 has 4 divisors (see below), whose sum is σ = 232983100. Its totient is φ = 199699776.

The previous prime is 216341431. The next prime is 216341453. The reversal of 216341437 is 734143612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 134420836 + 81920601 = 11594^2 + 9051^2 .

It is a cyclic number.

It is not a de Polignac number, because 216341437 - 2⁷ = 216341309 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216341399 and 216341408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216341431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8320812 + ... + 8320837.

It is an arithmetic number, because the mean of its divisors is an integer number (58245775).

Almost surely, 2^216341437 is an apocalyptic number.

It is an amenable number.

216341437 is a deficient number, since it is larger than the sum of its proper divisors (16641663).

216341437 is a wasteful number, since it uses less digits than its factorization.

216341437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16641662.

The product of its digits is 12096, while the sum is 31.

The square root of 216341437 is about 14708.5497925526. The cubic root of 216341437 is about 600.3159789367.

The spelling of 216341437 in words is "two hundred sixteen million, three hundred forty-one thousand, four hundred thirty-seven".