21610662231 has 8 divisors (see below), whose sum is σ = 28859031040. Its totient is φ = 14384700792.

The previous prime is 21610662223. The next prime is 21610662239. The reversal of 21610662231 is 13226601612.

It is an interprime number because it is at equal distance from previous prime (21610662223) and next prime (21610662239).

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

It is not a de Polignac number, because 21610662231 - 2³ = 21610662223 is a prime.

It is a super-2 number, since 2×21610662231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21610662239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5599591 + ... + 5603448.

It is an arithmetic number, because the mean of its divisors is an integer number (3607378880).

Almost surely, 2^21610662231 is an apocalyptic number.

21610662231 is a deficient number, since it is larger than the sum of its proper divisors (7248368809).

21610662231 is a wasteful number, since it uses less digits than its factorization.

21610662231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11203685.

The product of its (nonzero) digits is 5184, while the sum is 30.

The spelling of 21610662231 in words is "twenty-one billion, six hundred ten million, six hundred sixty-two thousand, two hundred thirty-one".