21610151 has 2 divisors, whose sum is σ = 21610152. Its totient is φ = 21610150.

The previous prime is 21610103. The next prime is 21610187. The reversal of 21610151 is 15101612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21610151 - 2¹⁸ = 21348007 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21615151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10805075 + 10805076.

It is an arithmetic number, because the mean of its divisors is an integer number (10805076).

Almost surely, 2^21610151 is an apocalyptic number.

21610151 is a deficient number, since it is larger than the sum of its proper divisors (1).

21610151 is an equidigital number, since it uses as much as digits as its factorization.

21610151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60, while the sum is 17.

The square root of 21610151 is about 4648.6719608938. The cubic root of 21610151 is about 278.5389498217.

Adding to 21610151 its reverse (15101612), we get a palindrome (36711763).

The spelling of 21610151 in words is "twenty-one million, six hundred ten thousand, one hundred fifty-one".