22154081 has 2 divisors, whose sum is σ = 22154082. Its totient is φ = 22154080.

The previous prime is 22154051. The next prime is 22154131. The reversal of 22154081 is 18045122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11971600 + 10182481 = 3460^2 + 3191^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22154081 is a prime.

It is a super-2 number, since 2×22154081² = 981606609909122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22154021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11077040 + 11077041.

It is an arithmetic number, because the mean of its divisors is an integer number (11077041).

Almost surely, 2^22154081 is an apocalyptic number.

It is an amenable number.

22154081 is a deficient number, since it is larger than the sum of its proper divisors (1).

22154081 is an equidigital number, since it uses as much as digits as its factorization.

22154081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 22154081 is about 4706.8121908570. The cubic root of 22154081 is about 280.8565648838.

The spelling of 22154081 in words is "twenty-two million, one hundred fifty-four thousand, eighty-one".