122520215 has 32 divisors (see below), whose sum is σ = 159183360. Its totient is φ = 90316800.

The previous prime is 122520193. The next prime is 122520247. The reversal of 122520215 is 512025221.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-122520215 is a prime.

It is a super-2 number, since 2×122520215² = 30022406167292450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 435875 + ... + 436155.

It is an arithmetic number, because the mean of its divisors is an integer number (4974480).

Almost surely, 2^122520215 is an apocalyptic number.

122520215 is a deficient number, since it is larger than the sum of its proper divisors (36663145).

122520215 is a wasteful number, since it uses less digits than its factorization.

122520215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 122520215 is about 11068.8849935303. The cubic root of 122520215 is about 496.6715114963.

Adding to 122520215 its reverse (512025221), we get a palindrome (634545436).

The spelling of 122520215 in words is "one hundred twenty-two million, five hundred twenty thousand, two hundred fifteen".