22051651 has 2 divisors, whose sum is σ = 22051652. Its totient is φ = 22051650.

The previous prime is 22051649. The next prime is 22051661. The reversal of 22051651 is 15615022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22051651 - 2¹ = 22051649 is a prime.

Together with 22051649, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22051661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11025825 + 11025826.

It is an arithmetic number, because the mean of its divisors is an integer number (11025826).

Almost surely, 2^22051651 is an apocalyptic number.

22051651 is a deficient number, since it is larger than the sum of its proper divisors (1).

22051651 is an equidigital number, since it uses as much as digits as its factorization.

22051651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 22051651 is about 4695.9185469938. The cubic root of 22051651 is about 280.4230467292.

Adding to 22051651 its reverse (15615022), we get a palindrome (37666673).

The spelling of 22051651 in words is "twenty-two million, fifty-one thousand, six hundred fifty-one".