122543215 has 4 divisors (see below), whose sum is σ = 147051864. Its totient is φ = 98034568.

The previous prime is 122543203. The next prime is 122543233. The reversal of 122543215 is 512345221.

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-122543215 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122543215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12254317 + ... + 12254326.

It is an arithmetic number, because the mean of its divisors is an integer number (36762966).

Almost surely, 2^122543215 is an apocalyptic number.

122543215 is a deficient number, since it is larger than the sum of its proper divisors (24508649).

122543215 is an equidigital number, since it uses as much as digits as its factorization.

122543215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24508648.

The product of its digits is 2400, while the sum is 25.

The square root of 122543215 is about 11069.9238931440. The cubic root of 122543215 is about 496.7025886265.

Adding to 122543215 its reverse (512345221), we get a palindrome (634888436).

The spelling of 122543215 in words is "one hundred twenty-two million, five hundred forty-three thousand, two hundred fifteen".