16553487 has 8 divisors (see below), whose sum is σ = 22091904. Its totient is φ = 11025368.

The previous prime is 16553479. The next prime is 16553501. The reversal of 16553487 is 78435561.

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 16553487 - 2³ = 16553479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16553477) 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, 2758 + ... + 6380.

It is an arithmetic number, because the mean of its divisors is an integer number (2761488).

Almost surely, 2^16553487 is an apocalyptic number.

16553487 is a deficient number, since it is larger than the sum of its proper divisors (5538417).

16553487 is a wasteful number, since it uses less digits than its factorization.

16553487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5149.

The product of its digits is 100800, while the sum is 39.

The square root of 16553487 is about 4068.5976699595. The cubic root of 16553487 is about 254.8569593774.

The spelling of 16553487 in words is "sixteen million, five hundred fifty-three thousand, four hundred eighty-seven".