103216405 has 8 divisors (see below), whose sum is σ = 123917184. Its totient is φ = 82534800.

The previous prime is 103216397. The next prime is 103216411. The reversal of 103216405 is 504612301.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 103216405 - 2³ = 103216397 is a prime.

It is a super-2 number, since 2×103216405² = 21307252522248050, which contains 22 as substring.

It is a Duffinian number.

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, 13200 + ... + 19510.

It is an arithmetic number, because the mean of its divisors is an integer number (15489648).

Almost surely, 2^103216405 is an apocalyptic number.

It is an amenable number.

103216405 is a deficient number, since it is larger than the sum of its proper divisors (20700779).

103216405 is an equidigital number, since it uses as much as digits as its factorization.

103216405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9587.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 103216405 is about 10159.5474800800. The cubic root of 103216405 is about 469.0828727764.

Adding to 103216405 its reverse (504612301), we get a palindrome (607828706).

The spelling of 103216405 in words is "one hundred three million, two hundred sixteen thousand, four hundred five".