16220507 has 4 divisors (see below), whose sum is σ = 16241040. Its totient is φ = 16199976.

The previous prime is 16220489. The next prime is 16220513. The reversal of 16220507 is 70502261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70502261 = 631 ⋅111731.

It is a cyclic number.

It is not a de Polignac number, because 16220507 - 2²⁰ = 15171931 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a zygodrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (16220537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9032 + ... + 10677.

It is an arithmetic number, because the mean of its divisors is an integer number (4060260).

Almost surely, 2^16220507 is an apocalyptic number.

16220507 is a deficient number, since it is larger than the sum of its proper divisors (20533).

16220507 is an equidigital number, since it uses as much as digits as its factorization.

16220507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20532.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 16220507 is about 4027.4690563678. The cubic root of 16220507 is about 253.1365216927.

Adding to 16220507 its reverse (70502261), we get a palindrome (86722768).

It can be divided in two parts, 16220 and 507, that multiplied together give a triangular number (8223540 = T₄₀₅₅).

The spelling of 16220507 in words is "sixteen million, two hundred twenty thousand, five hundred seven".