122155519 has 2 divisors, whose sum is σ = 122155520. Its totient is φ = 122155518.

The previous prime is 122155487. The next prime is 122155549. The reversal of 122155519 is 915551221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 122155519 - 2⁵ = 122155487 is a prime.

It is a super-2 number, since 2×122155519² = 29843941644318722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122155549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61077759 + 61077760.

It is an arithmetic number, because the mean of its divisors is an integer number (61077760).

Almost surely, 2^122155519 is an apocalyptic number.

122155519 is a deficient number, since it is larger than the sum of its proper divisors (1).

122155519 is an equidigital number, since it uses as much as digits as its factorization.

122155519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4500, while the sum is 31.

The square root of 122155519 is about 11052.3987894031. The cubic root of 122155519 is about 496.1782211067.

The spelling of 122155519 in words is "one hundred twenty-two million, one hundred fifty-five thousand, five hundred nineteen".