16552061 has 4 divisors (see below), whose sum is σ = 16999452. Its totient is φ = 16104672.

The previous prime is 16552057. The next prime is 16552079. The reversal of 16552061 is 16025561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16025561 = 701 ⋅22861.

It can be written as a sum of positive squares in 2 ways, for example, as 6280036 + 10272025 = 2506^2 + 3205^2 .

It is a cyclic number.

It is not a de Polignac number, because 16552061 - 2² = 16552057 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16552061.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16552051) 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, 223640 + ... + 223713.

It is an arithmetic number, because the mean of its divisors is an integer number (4249863).

Almost surely, 2^16552061 is an apocalyptic number.

It is an amenable number.

16552061 is a deficient number, since it is larger than the sum of its proper divisors (447391).

16552061 is an equidigital number, since it uses as much as digits as its factorization.

16552061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447390.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 16552061 is about 4068.4224215290. The cubic root of 16552061 is about 254.8496409504.

The spelling of 16552061 in words is "sixteen million, five hundred fifty-two thousand, sixty-one".