216334477 has 4 divisors (see below), whose sum is σ = 216937440. Its totient is φ = 215731516.

The previous prime is 216334471. The next prime is 216334483. The reversal of 216334477 is 774433612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (216334471) and next prime (216334483).

It is a cyclic number.

It is not a de Polignac number, because 216334477 - 2²³ = 207945869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216334471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300943 + ... + 301660.

It is an arithmetic number, because the mean of its divisors is an integer number (54234360).

Almost surely, 2^216334477 is an apocalyptic number.

It is an amenable number.

216334477 is a deficient number, since it is larger than the sum of its proper divisors (602963).

216334477 is an equidigital number, since it uses as much as digits as its factorization.

216334477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 602962.

The product of its digits is 84672, while the sum is 37.

The square root of 216334477 is about 14708.3131935651. The cubic root of 216334477 is about 600.3095412055.

It can be divided in two parts, 216334 and 477, that added together give a triangular number (216811 = T₆₅₈).

The spelling of 216334477 in words is "two hundred sixteen million, three hundred thirty-four thousand, four hundred seventy-seven".