21167825271 has 8 divisors (see below), whose sum is σ = 28227742464. Its totient is φ = 14109895800.

The previous prime is 21167825177. The next prime is 21167825309. The reversal of 21167825271 is 17252876112.

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

It is not a de Polignac number, because 21167825271 - 2⁹ = 21167824759 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21167325271) 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, 471901 + ... + 514806.

It is an arithmetic number, because the mean of its divisors is an integer number (3528467808).

Almost surely, 2^21167825271 is an apocalyptic number.

21167825271 is a deficient number, since it is larger than the sum of its proper divisors (7059917193).

21167825271 is an equidigital number, since it uses as much as digits as its factorization.

21167825271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993861.

The product of its digits is 94080, while the sum is 42.

The spelling of 21167825271 in words is "twenty-one billion, one hundred sixty-seven million, eight hundred twenty-five thousand, two hundred seventy-one".