16116551 has 4 divisors (see below), whose sum is σ = 17581704. Its totient is φ = 14651400.

The previous prime is 16116539. The next prime is 16116563. The reversal of 16116551 is 15561161.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (16116539) and next prime (16116563).

It is a cyclic number.

It is not a de Polignac number, because 16116551 - 2¹⁰ = 16115527 is a prime.

It is a super-2 number, since 2×16116551² = 519486432271202, which contains 22 as substring.

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 16116551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16116511) 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, 732560 + ... + 732581.

It is an arithmetic number, because the mean of its divisors is an integer number (4395426).

Almost surely, 2^16116551 is an apocalyptic number.

16116551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16116551 is a deficient number, since it is larger than the sum of its proper divisors (1465153).

16116551 is a wasteful number, since it uses less digits than its factorization.

16116551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465152.

The product of its digits is 900, while the sum is 26.

The square root of 16116551 is about 4014.5424396810. The cubic root of 16116551 is about 252.5945847001.

The spelling of 16116551 in words is "sixteen million, one hundred sixteen thousand, five hundred fifty-one".