122215559 has 4 divisors (see below), whose sum is σ = 122266560. Its totient is φ = 122164560.

The previous prime is 122215553. The next prime is 122215573. The reversal of 122215559 is 955512221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122215559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122215553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21719 + ... + 26760.

It is an arithmetic number, because the mean of its divisors is an integer number (30566640).

Almost surely, 2^122215559 is an apocalyptic number.

122215559 is a deficient number, since it is larger than the sum of its proper divisors (51001).

122215559 is an equidigital number, since it uses as much as digits as its factorization.

122215559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51000.

The product of its digits is 9000, while the sum is 32.

The square root of 122215559 is about 11055.1146081802. The cubic root of 122215559 is about 496.2594990853.

The spelling of 122215559 in words is "one hundred twenty-two million, two hundred fifteen thousand, five hundred fifty-nine".