22155407 has 2 divisors, whose sum is σ = 22155408. Its totient is φ = 22155406.

The previous prime is 22155373. The next prime is 22155433. The reversal of 22155407 is 70455122.

It is an a-pointer prime, because the next prime (22155433) can be obtained adding 22155407 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 22155407 - 2¹⁶ = 22089871 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 (22155467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11077703 + 11077704.

It is an arithmetic number, because the mean of its divisors is an integer number (11077704).

Almost surely, 2^22155407 is an apocalyptic number.

22155407 is a deficient number, since it is larger than the sum of its proper divisors (1).

22155407 is an equidigital number, since it uses as much as digits as its factorization.

22155407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2800, while the sum is 26.

The square root of 22155407 is about 4706.9530484168. The cubic root of 22155407 is about 280.8621681912.

The spelling of 22155407 in words is "twenty-two million, one hundred fifty-five thousand, four hundred seven".