16551142 has 4 divisors (see below), whose sum is σ = 24826716. Its totient is φ = 8275570.

The previous prime is 16551133. The next prime is 16551151. The reversal of 16551142 is 24115561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24115561 = 43 ⋅560827.

It is an interprime number because it is at equal distance from previous prime (16551133) and next prime (16551151).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4137784 + ... + 4137787.

It is an arithmetic number, because the mean of its divisors is an integer number (6206679).

Almost surely, 2^16551142 is an apocalyptic number.

16551142 is a deficient number, since it is larger than the sum of its proper divisors (8275574).

16551142 is an equidigital number, since it uses as much as digits as its factorization.

16551142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8275573.

The product of its digits is 1200, while the sum is 25.

The square root of 16551142 is about 4068.3094769204. The cubic root of 16551142 is about 254.8449242940.

The spelling of 16551142 in words is "sixteen million, five hundred fifty-one thousand, one hundred forty-two".