21960151 has 2 divisors, whose sum is σ = 21960152. Its totient is φ = 21960150.

The previous prime is 21960149. The next prime is 21960199. The reversal of 21960151 is 15106912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21960151 - 2¹ = 21960149 is a prime.

Together with 21960149, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21960131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10980075 + 10980076.

It is an arithmetic number, because the mean of its divisors is an integer number (10980076).

Almost surely, 2^21960151 is an apocalyptic number.

21960151 is a deficient number, since it is larger than the sum of its proper divisors (1).

21960151 is an equidigital number, since it uses as much as digits as its factorization.

21960151 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 25.

The square root of 21960151 is about 4686.1659168237. The cubic root of 21960151 is about 280.0346513238.

The spelling of 21960151 in words is "twenty-one million, nine hundred sixty thousand, one hundred fifty-one".