16020251 has 4 divisors (see below), whose sum is σ = 17252592. Its totient is φ = 14787912.

The previous prime is 16020241. The next prime is 16020253. The reversal of 16020251 is 15202061.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16020251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16020253) 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, 616151 + ... + 616176.

It is an arithmetic number, because the mean of its divisors is an integer number (4313148).

Almost surely, 2^16020251 is an apocalyptic number.

16020251 is a deficient number, since it is larger than the sum of its proper divisors (1232341).

16020251 is a wasteful number, since it uses less digits than its factorization.

16020251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1232340.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 16020251 is about 4002.5305745241. The cubic root of 16020251 is about 252.0904762465.

The spelling of 16020251 in words is "sixteen million, twenty thousand, two hundred fifty-one".