16503122 has 4 divisors (see below), whose sum is σ = 24754686. Its totient is φ = 8251560.

The previous prime is 16503119. The next prime is 16503131. The reversal of 16503122 is 22130561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22130561 = 47 ⋅470863.

It can be written as a sum of positive squares in only one way, i.e., 14432401 + 2070721 = 3799^2 + 1439^2 .

It is a junction number, because it is equal to n+sod(n) for n = 16503094 and 16503103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4125779 + ... + 4125782.

Almost surely, 2^16503122 is an apocalyptic number.

16503122 is a deficient number, since it is larger than the sum of its proper divisors (8251564).

16503122 is an equidigital number, since it uses as much as digits as its factorization.

16503122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8251563.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 16503122 is about 4062.4034757764. The cubic root of 16503122 is about 254.5982241477.

Adding to 16503122 its reverse (22130561), we get a palindrome (38633683).

The spelling of 16503122 in words is "sixteen million, five hundred three thousand, one hundred twenty-two".