16531252164251 has 4 divisors (see below), whose sum is σ = 18034093270104. Its totient is φ = 15028411058400.

The previous prime is 16531252164241. The next prime is 16531252164263. The reversal of 16531252164251 is 15246125213561.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 16531252164251 - 2³⁰ = 16530178422427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16531252164241) 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, 751420552910 + ... + 751420552931.

It is an arithmetic number, because the mean of its divisors is an integer number (4508523317526).

Almost surely, 2^{16531252164251} is an apocalyptic number.

16531252164251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

16531252164251 is a deficient number, since it is larger than the sum of its proper divisors (1502841105853).

16531252164251 is a wasteful number, since it uses less digits than its factorization.

16531252164251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502841105852.

The product of its digits is 432000, while the sum is 44.

The spelling of 16531252164251 in words is "sixteen trillion, five hundred thirty-one billion, two hundred fifty-two million, one hundred sixty-four thousand, two hundred fifty-one".