5216405 has 8 divisors (see below), whose sum is σ = 6278712. Its totient is φ = 4160448.

The previous prime is 5216381. The next prime is 5216411. The reversal of 5216405 is 5046125.

It can be written as a sum of positive squares in 4 ways, for example, as 1062961 + 4153444 = 1031^2 + 2038^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 5216405 - 2¹⁰ = 5215381 is a prime.

It is a super-2 number, since 2×5216405² = 54421762248050, 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, 467 + ... + 3263.

It is an arithmetic number, because the mean of its divisors is an integer number (784839).

Almost surely, 2^5216405 is an apocalyptic number.

5216405 is the 1865-th pentagonal number.

It is an amenable number.

5216405 is a deficient number, since it is larger than the sum of its proper divisors (1062307).

5216405 is a wasteful number, since it uses less digits than its factorization.

5216405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3175.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 5216405 is about 2283.9450518784. The cubic root of 5216405 is about 173.4298176669.

The spelling of 5216405 in words is "five million, two hundred sixteen thousand, four hundred five".