16425331 has 4 divisors (see below), whose sum is σ = 17688832. Its totient is φ = 15161832.

The previous prime is 16425317. The next prime is 16425337. The reversal of 16425331 is 13352461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13352461 = 2297 ⋅5813.

It is a cyclic number.

It is not a de Polignac number, because 16425331 - 2⁷ = 16425203 is a prime.

It is a super-2 number, since 2×16425331² = 539582996919122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16425296 and 16425305.

It is not an unprimeable number, because it can be changed into a prime (16425337) 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, 631731 + ... + 631756.

It is an arithmetic number, because the mean of its divisors is an integer number (4422208).

Almost surely, 2^16425331 is an apocalyptic number.

16425331 is a deficient number, since it is larger than the sum of its proper divisors (1263501).

16425331 is a wasteful number, since it uses less digits than its factorization.

16425331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1263500.

The product of its digits is 2160, while the sum is 25.

The square root of 16425331 is about 4052.8176618249. The cubic root of 16425331 is about 254.1975595284.

Adding to 16425331 its reverse (13352461), we get a palindrome (29777792).

The spelling of 16425331 in words is "sixteen million, four hundred twenty-five thousand, three hundred thirty-one".