216622104 has 32 divisors (see below), whose sum is σ = 542438640. Its totient is φ = 72089600.

The previous prime is 216622069. The next prime is 216622111. The reversal of 216622104 is 401226612.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8344 + ... + 22424.

Almost surely, 2^216622104 is an apocalyptic number.

216622104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

216622104 is an abundant number, since it is smaller than the sum of its proper divisors (325816536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216622104 is a wasteful number, since it uses less digits than its factorization.

216622104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14731 (or 14727 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 216622104 is about 14718.0876475173. The cubic root of 216622104 is about 600.5754701027.

Adding to 216622104 its reverse (401226612), we get a palindrome (617848716).

It can be divided in two parts, 216 and 622104, that multiplied together give a square (134374464 = 11592²).

The spelling of 216622104 in words is "two hundred sixteen million, six hundred twenty-two thousand, one hundred four".