22154887 has 2 divisors, whose sum is σ = 22154888. Its totient is φ = 22154886.

The previous prime is 22154879. The next prime is 22154929. The reversal of 22154887 is 78845122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22154887 - 2³ = 22154879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22124887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11077443 + 11077444.

It is an arithmetic number, because the mean of its divisors is an integer number (11077444).

Almost surely, 2^22154887 is an apocalyptic number.

22154887 is a deficient number, since it is larger than the sum of its proper divisors (1).

22154887 is an equidigital number, since it uses as much as digits as its factorization.

22154887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 35840, while the sum is 37.

The square root of 22154887 is about 4706.8978106604. The cubic root of 22154887 is about 280.8599708424.

The spelling of 22154887 in words is "twenty-two million, one hundred fifty-four thousand, eight hundred eighty-seven".