16061551 has 8 divisors (see below), whose sum is σ = 17703504. Its totient is φ = 14449920.

The previous prime is 16061543. The next prime is 16061557. The reversal of 16061551 is 15516061.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16061551 - 2³ = 16061543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16061557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6460 + ... + 8593.

It is an arithmetic number, because the mean of its divisors is an integer number (2212938).

Almost surely, 2^16061551 is an apocalyptic number.

16061551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16061551 is a deficient number, since it is larger than the sum of its proper divisors (1641953).

16061551 is a wasteful number, since it uses less digits than its factorization.

16061551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15161.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 16061551 is about 4007.6864897344. The cubic root of 16061551 is about 252.3069190205.

Subtracting from 16061551 its reverse (15516061), we obtain a triangular number (545490 = T₁₀₄₄).

The spelling of 16061551 in words is "sixteen million, sixty-one thousand, five hundred fifty-one".